The interviewer would like to know a bit more about your career goals, now, and in the longer term. If you are newer to your career, you may be put on city pairs to start and then trained for international work. It is important to express that you are willing to start wherever Korean Air will have you. This approach is the team-player attitude they will be seeking.
"I love the idea of flying around the world and experiencing international destinations. With that said, city pairs also keep me close to home, allowing for a better work-life balance. I am happy to work on any flights that you would offer to me at this time."
"I am not going to be choosy regarding the opportunities given to me. I am happy with either option and am prepared to travel internationally or remain more local. Either way, I am more interested in my goal of working for Korean Air."