A little help with Comic Con tickets.

Well, I'm just going to go straight to the point here. I recently bought some tickets for upcoming Comic Con in San Diego. However, I promised a friend. That means I'd end up buying another ticket for myself, and I don't want to do that.

I've clicked in the "Search for my registration checkbox but nothing happens, the registration process goes on normally.

So, the main question here is: How can I get another ticket on my friends name wihtout registering again?