How do I have things to say in conversations?

I have this issue where I don’t know what to say in conversations so I get quiet. I have this theory that it's due to having poor memory.

Since I can’t remember aspects of what goes on in my life, I have issues coming up with concepts that I can talk about in conversations.

Does anyone else have this problem and if so how is your memory in general? I’m trying to understand if I am focusing on the wrong solution.

Any general tips on how to improve?