While not necessarily a trick question being thrown your way during your interview, you definitely need to strike a balance in your answer here as the role of a Flight Attendant requires some routine work and the ability to be flexible in what you may be called upon to do during your work day. As you answer and prove your ability to work a routine while being flexible, don't hesitate to point out a role you've had in the past where you had to do just this.

"I prefer working in a more predictable environment because I can be more effective in my tasks. This would prove to be very beneficial with the passengers that I would be serving on a daily basis. With that said, I can certainly work in an unpredictable environment from time to time. I learned quickly early in my career that being flexible in my work was necessary, as I imagine it is to be successful as a Flight Attendant with your airline."