HelloWorldCommand.php

<?php
namespace AppBundle\Telegram\Command;

use BoShurik\TelegramBotBundle\Telegram\Command\AbstractCommand;

use TelegramBot\Api\BotApi;
use TelegramBot\Api\Types\Message;

class HelloWorldCommand extends AbstractCommand
{
 
    /**
     * @inheritDoc
     */
    public function getName()
    {
        return '/hello';
    }

    /**
     * @inheritDoc
     */
    public function getDescription()
    {
        return '"Hello world" example';
    }

    /**
     * @inheritDoc
     */
    public function execute(BotApi $api, Message $message)
    {
        $api->sendMessage($message->getChat()->getId(), 'Hello world!');
    }
}

services.yml

services:
    app.telegram.command.help:
        class: AppBundle\Telegram\Command\HelloWorldCommand
        tags:
            - { name: bo_shurik_telegram_bot.command }