Lol, this is called a Visitor Message, or VM. They are posted publicly on your page, as opposed to a PM, which is sent privately.Don't worry about responding, it's not a big deal (it didn't t take you long at all to reply anyways.)
Hey, hello! Thank you very much! It's very nice to hear you liked. Although it's more like a monologue than RP, maybe? I just hope the GM's like it, too.
P. S.: I'm new in the forum, just right now I found out I had a PM. I said it in case it waited too long unanswered.