As a Customer Service Agent in the airline industry, you will be expected to provide great service, accurate information, and resolve issues for airline customers over the phone. To understand your ability to effectively handle this aspect of the job, your interviewer is posing this question to you. If you do have past experience in working a phone line, talk about that experience and the skills you used to provide great service. Most importantly, be sure to talk about the things you learned in that job that you will be able to use in this role as a Customer Service Agent. As you answer, try to focus on the things you did over the phone to provide the best service possible.