One thing I would recommend doing is to bring extra resumes. I would talk to other airlines so you can practice what you are going to say. Worst case is you learn something about the airline that may interest you.
After you are done talking to an airline, write down the entire conversation on paper. Write down the questions asked, the answers you gave, and think about how you can improve your answers. Your need to practice how you communicate your message to the recruiter.
If you are really bored practice your answers with another attendee. Good luck and if you have any questions please let us know.