def interact_alice(agent: Agent):
    """
    Exchange messages between basic pipelines and the Yandex.Dialogs service.
    If the pipeline returns multiple values, only the first one is forwarded to Yandex.
    """
    data = request.get_json()
    text = data['request'].get('command', '').strip()
    payload = data['request'].get('payload')

    session_id = data['session']['session_id']
    user_id = data['session']['user_id']
    message_id = data['session']['message_id']

    dialog_id = DialogID(user_id, session_id)

    response = {
        'response': {
            'end_session': True,
            'text': ''
        },
        "session": {
            'session_id': session_id,
            'message_id': message_id,
            'user_id': user_id
        },
        'version': '1.0'
    }

    agent_response: Union[str, RichMessage] = agent([payload or text], [dialog_id])[0]
    if isinstance(agent_response, RichMessage):
        response['response']['text'] = '\n'.join([j['content']
                                                  for j in agent_response.json()
                                                  if j['type'] == 'plain_text'])
    else:
        response['response']['text'] = str(agent_response)

    return jsonify(response), 200
Exchange messages between basic pipelines and the Yandex.Dialogs service.
    If the pipeline returns multiple values, only the first one is forwarded to Yandex.