In some implementations, the analysis device(s) 120 may provide various service(s) to user(s) 102. The service(s) may include financial service(s) associated with banking, investment management, lending, home financing, and so forth. In some instances, the service(s) may include insurance service(s) for health insurance, vehicle insurance, life insurance, homeowner's insurance, and so forth. Implementations also support other types of service(s). The user 102 may be provided with information associated with the various services. In some instances, the sensitive information can include information related to these services. For example, sensitive information may include account balances and/or transaction history related to financial accounts, insurance claims status related to an insurance policy, and so forth. Sensitive information may also include requests for operations to be performed, where such operations may involve some risk of fraud, theft, or other harm if they were performed for unauthorized individuals. For example, a user's request for sensitive information may be the user 102 requesting a funds transfer from one financial account to another. If the user 102 makes such a request through the PA device 104, the transfer may be performed if the user 102 has been authenticated.

FIG. 3 depicts a flow diagram of an example process for authenticating a user 102, according to implementations of the present disclosure. Operations of the process may be performed by one or more of the CUI 108, the analysis module(s) 122, the authentication engine 124, the transcription engine 126, the model(s) 128, and/or other module(s) of the PA device 104, the analysis device(s) 120, and/or other device(s).