Perhaps they don't like blondes, or New Yorkers, or whatever. Your interviewer is usually a flight attendant on special assignment, and may not be a professionally trained interviewer. Or, it may come down to five excellent candidates, and they have only four openings. This is where all the little things you could or could not do in the interview will make or break you. Turn this disappointment into a positive learning experience and go on to interview with other carriers.
Perseverance is the key to success.
Simply accept the loss, move on, and try them again at your next eligible date. I remember at my final interview, we were all sitting around guessing which applicants would most likely get the job. Pen Watch Allow adequate travel time to avoid a late arrival. Interviewers will close the doors to the interview room promptly on the specified hour. Airlines operate on strict timetables.