How can I reply to someone that makes a post?

I clicked on REPLY under someones post meaning to reply to that person who had placed the post.

My reply came up as have been sent by the person who had made the original post.

Is there a way that I can reply directly to the person making the original post, or question?

** This is what I mean.. I am not GC,  I am just asking the question.  I had originally tried to REPLY to GC.