The interviewer is trying to picture how you would work with the team and if your personality would be a good fit for the working environment. Try to think about your best personality trait and how it might benefit the position. For example, if you are applying to a Crew Team Member position and you are friendly, use that as it will benefit the position. If you are ambitious and applying for a leadership position, tie in how your ambition drives you to do your best and reach your goals.