A call can be received from a user. At least one input can be received from the user. Responsive to receiving the input(s) from the user, a user profile for the user can be identified or created. The user profile can indicate one or more speech traits of the user. A virtual intelligent voice response (VIVR) agent individually configured for the user can be identified or created. The VIVR agent can be configured to include, or identify, one or more VIVR agent features corresponding to the speech trait(s) of the user. The user can be interacted with on the call by generating synthesized speech using parameters specified by the VIVR agent feature(s) included in, or identified by, the VIVR agent individually configured for the user.