Steps before a William Morris Endeavor info meeting?

Basically, I sent a letter out to WME thinking that they wouldn't even think about calling me, but they did. They scheduled me for a "informational meeting" as they called it and I'm flipping out. Obviously I want to wow them, but I would like to know if there's anything I should know beforehand. Are there specific things they're going to ask me? Are there things I need to know before going in?