As the first point of contact between a company and the client, a customer service representative must have impeccable communication skills and conflict resolution abilities. Expect your interview to consist of a lot of role-play or "describe a time when..." questions that will test your ability to deal with irate clients, work well under pressure, and always keep a calm and professional composure.
Pretend I need to buy a pen, and your company sells pens. Why should I buy your pen?
I described the look and feel of the pen. How it was about the same price as the competition, but it was a better quality and would last longer and therefore save them money in the long run when they wouldn't need to replace it as quickly.
While this pen is slightly more expensive, it is of higher quality craftsmanship. It will not blot or leak like other pens tend to do and is most comfortable in your hand.