Assure the interviewer that you are aware of the inconsistent schedule associated with being a flight attendant. However, any questions you have pertaining to these expectations, you'll want to answer for yourself before your interview. There was recently an agreement between Spirit Airlines and the flight attendants in the service of Spirit Airlines through their union that offers protections and limitations regarding overtime, among other things. Spend some time reading through this agreement and avoid bringing it up in your interview. Discussions on Unions can be a touchy subject, and you never know where they stand on such issues. So in this case, it is best to inform yourself and be straightforward with your response.