Customer Service is always challenging. However, every day you work you will encounter a really nice or interesting person, as well as someone who is a real jerk. It is your choice which one you choose to remember for the rest of the day.
When you work customer service, you ARE the company. The customer cannot actually find the person who caused their problems, so they take it out on you. You will learn certain skills, such as "Active listening." People who are upset want to be heard. So listen first, and then speak. And don't say what you CAN't do, you say what you CAN do. Sometimes you will coordinate things with other employees, or even other airlines, to help get the customer's problems resolved.
I personally would never work someplace where my calls are timed, such as in most call centers. I think it is easier working face to face with customers, because it is easier to pick up on body language, and, for you to use body language, to communicate.
I was an Airport Police Officer, and was frequently called to settle "irate customer" situations. The thing to keep in mind at the airport, is that many people find travelling to be stressful. (In fact, there are a lot of heart attacks associated with travelling!) So people are already edgy before things go wrong. Because we responded so quickly, the airlines employees often did things to provoke the customers, then called us. Some of the ones I remember:
An airplane was fully loaded with customers, ready to go Dallas. Another airplane was supposed to be going to El Paso, but it had a mechanical problem. For logistical reasons, the airline decided to have all the people on the Dallas plane get off that plane, and use it to go to El Paso. AND, they told the passengers that was what they were doing. Not good.
An airplane had a mechanical problem, and the airline had someone driving a replacement part from a city six hours away. They kept telling the passengers the plane would be leaving "in 45 minutes," so every 45 minutes, when the plane was not ready, the passengers kept getting unruly.
An airplane was supposed to land in another city, but because of bad weather, came to our city instead. The union contract the employees were working under prohibited them from offloading the luggage for that flight!
Your job as customer service is to explain things and help the customers to resolve their problems. It's not an easy job, but, can be very rewarding. I think the only thing different about doing it at the airport is the level of stress many people already have. Airports are exciting places, and I really enjoyed working there. I hope you will someday experience that same excitement!
Hope this has helped in some way!