Help Setting up my Bot

I am new to this and I’m trying to make a bot. I have setup Automated responses, however, I don’t know how to make my bot not say anything. I mean, it always say something whenever someone is chatting, Is there a way to turn that off, and just response only when the Keyword is mentioned ?

I need tutor for this, I am trying to make a bot to help with my business, However as by testing it, it always response to every messages even without the keyword. I only want it to respond whenever Keyword is mentioned.

Thanks for who will answer.