I'm trying to book an United business class award flight for 3 (me, wife, kid) from Houston to Europe for next September. Obviously, there is much less availability for 3 than 2 or 1. Is it safe to assume that if there isn't availability for 3 in business class shown on United.com, then I can't book an award for 2 and then 1 on the same flight? I guess I'm wondering if searching for 3 is searching for 3 seats together, but maybe I can book 2 together and then 1 by itself. Is that possible?