A system and method for message-based call communication is provided. Speech utterances are obtained from a caller during a call with an agent. Each of the speech utterances are transcribed into a text message and the text messages are provided to the agent. One or more written responses, in reply to each speech utterance from the caller, are received from the agent. The written responses are converted to synthesized speech for providing to the caller. The speech utterances from the caller and the synthesized speech from the agent are processed and one or more characteristics of the caller and the agent are identified. A role for each of the caller and the agent is determined based on the identified characteristics.