While your interviewer will be able to get great insight into your technical expertise during your interviewer, this one question will allow you the opportunity to describe how you will bring solid interpersonal skills to the role. Your interview knows that customers will rely on you to provide quick and sensible support for their needs, but the expectation to do that in a pleasing manner is of utmost importance. Talk from a high level about your feelings on why providing great service is important and give an example or two of ways that you have done that in the past.
"To me, my job duties aren't fully satisfied if an end user leaves our conversation without a smile on their face. While any technical support specialist can handle the customer aspect of the job, few have the people skills to do so pleasantly for their customers. In any interaction that I have with a customer, I talk in a calm and boosting manner. If they are upset or mad about a situation, I reflectively listen and never place any blame back on them. By taking this approach, my customer surveys in my current position have been excellent for the three years I've held that role."
"If hired for this role here at Edupoint Educational Systems, you'll quickly find that my mantra in working with customers is speed with a smile. To do this, I need to be resourceful in providing them with an answer or triaging them to the correct person. I need to be knowledgeable in our product base to give them answers with confidence. And last, but not least, I need to be positive in all interactions with them."