responsive message when someone mentions my Twitch name in chat

Hello, I want help with something if you guys can figure out the code for me that would be great.
I want a message responsive system so when someone @'s me in a twitch chat. It will auto-respond to them without me typing out a message.

It doesn't have to be the word "hey" it can be any word but if the person @'s me in chat, it will auto message them saying "Hello or hey" If you get my drift?
"@9nty Hey"

Then I want my bot to respond saying

"Hey @User (with twitch emotes added to the message reply"