/**
     * @param CallbackQuery $query
     * @return \Longman\TelegramBot\Entities\ServerResponse
     * @throws \Longman\TelegramBot\Exception\TelegramException
     */
    public function answer(CallbackQuery $query) {
        $callback_data = $query->getData();
        $chat_id = $query->getMessage()->getChat()->getId();
        $user_id = $query->getFrom()->getId();
        $pdo = DB::getPdo();

        if (strpos($callback_data, 'feedback_') !== 0) {
            return Request::emptyResponse();
        }

        $current = substr($callback_data, strlen('feedback_')); // Feedback ID

        $conversation = new Conversation($user_id, $chat_id, $this->getName());
        $conversation->notes['state'] = 'message';
        $conversation->update();

        /**
         * TODO
         */
    }