What is claimed is:1. A method comprising:obtaining, using a first transcription generation technique, a first transcription of a first communication session between a first device associated with a first user and a second device associated with a second user;providing the first transcription to the first device during the first communication session;obtaining a first user rating of the first transcription, the first user rating indicating feedback from the first user regarding the first transcription of the first communication session;after termination of the first communication session, obtaining, using the first transcription generation technique, a second transcription of a second communication session between the first device and a third device associated with a third user;providing the second transcription to the first device during the second communication session;obtaining a second user rating of the second transcription, the second user rating indicating feedback from the first user regarding the second transcription of the second communication session;after obtaining the first and second user ratings and after termination of the second communication session, selecting, based on the first and second user ratings, a second transcription generation technique for a third communication session between the first device and a fourth device; andproviding, to the first device during the third communication session, a third transcription that is obtained using the second transcription generation technique.2. The method of claim 1, wherein:the first transcription generation technique includes using a fully machine based automatic speech recognition system to generate the first transcription and the second transcription; andthe second transcription generation technique includes using a re-voicing speech recognition system to generate the third transcription.3. The method of claim 1, wherein:the first transcription generation technique includes using a first fully machine based automatic speech recognition system to generate the first transcription and the second transcription; andthe second transcription generation technique includes using a second fully machine based automatic speech recognition system to generate the third transcription.4. The method of claim 1, wherein obtaining the first user rating includes:directing presentation of a request for the first user rating on the first device after termination of the first communication session; andobtaining the first user rating from the first device based on a response to the request.5. The method of claim 1, wherein selecting the second transcription generation technique includes:determining a number of negative user ratings of a plurality of user ratings from the first user, which include the first user rating and the second user rating, that meet a negative rating threshold; andselecting the second transcription generation technique based on the number of negative user ratings meeting a number threshold.6. The method of claim 1, wherein selecting the second transcription generation technique includes:determining a ratio of negative user ratings that meet a negative rating threshold with respect to a plurality of user ratings from the first user that include the first user rating and the second user rating; andselecting the second transcription generation technique based on the ratio of negative user ratings meeting a ratio threshold.7. The method of claim 1, wherein selecting the second transcription generation technique includes:determining an average user rating of a plurality of user ratings from the first user that include the first user rating and the second user rating; andselecting the second transcription generation technique based on the average user rating meeting a negative rating threshold.8. At least one non-transitory computer-readable media configured to store one or more instructions that in response to being executed by at least one computing system cause performance of the method of claim 1.9. A method comprising:obtaining a first user rating of a first transcription of a first communication session between a first device associated with a first user and a second device associated with a second user, the first user rating indicating feedback from the first user regarding the first transcription and the first transcription obtained using a first transcription generation technique;after termination of the first communication session, obtaining a second user rating of a second transcription of a second communication session between the first device and a third device associated with a third user, the second user rating indicating feedback from the first user regarding the second transcription and the second transcription obtained using the first transcription generation technique;selecting, based on the first and second user ratings, a second transcription generation technique for a third communication session between the first device and a fourth device;obtaining, during the third communication session, a third transcription that is obtained using the second transcription generation technique; andproviding the third transcription to the first device during the third communication session.10. The method of claim 9, wherein:the first transcription generation technique includes using a fully machine based automatic speech recognition system to generate the first transcription and the second transcription; andthe second transcription generation technique includes using a re-voicing speech recognition system to generate the third transcription.11. The method of claim 9, wherein:the first transcription generation technique includes using a first fully machine based automatic speech recognition system to generate the first transcription and the second transcription; andthe second transcription generation technique includes using a second fully machine based automatic speech recognition system to generate the third transcription.12. The method of claim 9, wherein obtaining the first user rating includes:directing presentation of a request for the first user rating on the first device after termination of the first communication session; andobtaining the first user rating from the first device based on a response to the request.13. The method of claim 9, wherein selecting the second transcription generation technique includes:determining a number of negative user ratings of a plurality of user ratings from the first user, which include the first user rating and the second user rating, that meet a negative rating threshold; andselecting the second transcription generation technique based on the number of negative user ratings meeting a number threshold.14. The method of claim 9, wherein selecting the second transcription generation technique includes:determining a ratio of negative user ratings that meet a negative rating threshold with respect to a plurality of user ratings from the first user that include the first user rating and the second user rating; andselecting the second transcription generation technique based on the ratio of negative user ratings meeting a ratio threshold.15. The method of claim 9, wherein selecting the second transcription generation technique includes:determining an average user rating of a plurality of user ratings from the first user that include the first user rating and the second user rating; andselecting the second transcription generation technique based on the average user rating meeting a negative rating threshold.16. At least one non-transitory computer-readable media configured to store one or more instructions that in response to being executed by at least one computing system cause performance of the method of claim 9.17. A system comprising:one or more processors;and one or more Non-transitory computer-readable media configured to store instructions that in response to being executed by the one or more processors cause the system to perform operations, the operations comprising:obtaining a first user rating of a first transcription of a first communication session between a first device associated with a first user and a second device associated with a second user, the first user rating indicating feedback from the first user regarding the first transcription and the first transcription obtained using a first transcription generation technique;after termination of the first communication session, obtaining a second user rating of a second transcription of a second communication session between the first device and a third device associated with a third user, the second user rating indicating feedback from the first user regarding the second transcription and the second transcription obtained using the first transcription generation technique;selecting, based on the first and second user ratings a second transcription generation technique for a third communication session between the first device and a fourth device;obtaining, during the subsequent third communication session, a third transcription that is obtained using the second transcription generation technique; and providing the third transcription to the first device during the third communication session.18. The system of claim 17, wherein:the first transcription generation technique includes using a fully machine based automatic speech recognition system to generate the first transcription and the second transcription; andthe second transcription generation technique includes using a re-voicing speech recognition system to generate the third transcription.19. The system of claim 17, wherein:the first transcription generation technique includes using a first fully machine based automatic speech recognition system to generate the first transcription and the second transcription; andthe second transcription generation technique includes using a second fully machine based automatic speech recognition system to generate the third transcription.20. The system of claim 17, wherein selecting the second transcription generation technique includes:determining an average user rating of a plurality of user ratings from the first user that include the first user rating and the second user rating; andselecting the second transcription generation technique based on the average user rating meeting a negative rating threshold.