Trigger a new interaction for the Conversational AI Cloud project within a given culture. The interaction requires input to be provided in the form of a question provided by an end-user. If a session is provided for the interaction, the conversation will continue using the state of that session. If no session is provided for the interaction a new session will be instantiated and returned with the response. If an expired session is provided a new session wil be started and the old session will be linked to the new session in the analytics environment.