They like me! They really like me!

Dear Ms. Anderson,

On behalf of the Planning Committee, I am pleased to inform you that we have accepted your proposal, "A Deeply Horrible Person? In Search of the Real Severus Snape", for presentation at Convention Alley.

In addition, we would like to ask if you would be interested in participating in a panel discussion on Snape...

Woo HOO! I'm going to Ottawa! All things being equal, that is...

So, how many of you may I expect to see in the audience for my presentation, hmm?