Answer:
I first of all realized I was not paying attention. (cause, it's way too easy to not listen to what others are saying) Then I gave the person eye contact(but not too much cause that makes people uncomfortable) and nodded my head every once and a while. And after they were done talking or stating there opinion I gave them my answer or opinion about the topic in a clear voice so the other person or the other people in the conversation.
Having a conversation is really hard for some, but like drinking water for others.