I think you just did.
See you there!
EDIT: I've been asked a few times "Why do we have to RSVP?"
Actually, I'm trying to get a rough estimate on the number of people to expect as a basic courtesy to our surrounding exhibitors. I'd like to be able to tell them in advance that a large crowd may gather if it will affect their exhibit in any way. I'd also like to be able to give them an approximate head count.
(and request Convention Center assistance if necessary)