Suggest you book what you can for next year and then just walk-in next time you are at any GE airport. When Mrs. SFO had her interview at SFO in August, we stopped in an hour early without a problem. We the only ones in the office for the 20-25 minute duration of the interview. Not sure if this will work but it's worth a try. As long as you have an interview, all the data you need is in the system.