To make the agent hang up when the user says goodbye, you can implement a function tool that handles this action. Here is an example of how it can be done:

@function_tool
async def end_call(self, context: RunContext):
    """When the user says goodbye, call this function to end the conversation."""
    # interrupt any existing generation
    self.session.interrupt()

    # generate a goodbye message and hang up
    # awaiting it will ensure the message is played out before returning
    await self.session.generate_reply(
        instructions="say a brief goodbye to the user", 
        allow_interruptions=False
    )

    # Delete the room to end the call
    job_ctx = get_job_context()
    await job_ctx.api.room.delete_room(api.DeleteRoomRequest(room=job_ctx.room.name))

This function interrupts any ongoing speech, generates a final goodbye message, and deletes the room to end the call. You can configure the agent to call this function when it detects the user saying goodbye. Sources: Tree View: | dse-workbench