How to chat with Robot?

Hi guys, today I talked about WhatsApp on MyRobotLab but it's impossible and I was advised to use XMPP service. Now, I've a problem, I don't found a service to use this, Google Talk was replaced from Hangouts and it don't support XMPP, I search also for Telegram and other but nothing.
 
Please, could you help me? Thanks in advance