After your interview, Sandi will call you. What did she tell you when didn't offer a class date to you? Based on your conversation with Sandi will determine what you can do I would think.

This is assuming it was an actual full suit, ATP test, logbook, and panel interview. The job fair doesn't count as an interview. You won't hear back from the job fair unless you are selected to continue with the process. You can go to a job fair as many times as you want.