If you have dealt with angry customers before, you know that sometimes people simply need to be heard. Demonstrating patience and being willing to listen will help you resolve some of the most challenging customer situations. Here's an example for how you can answer this question:

"Whenever I speak to an angry customer, I am careful to lower my voice and listen to their needs. Sometimes they simply need to vent. I empathize by letting them know I hear what they are saying and understand. If there is anything I can do to resolve it, I act on it. Otherwise, I ask them how I can help them and do my best to meet whatever needs I can."

If you've ever dealt with a customer who made a scene, talk about how you took control over the situation by pulling them aside into your office to make sure they didn't disturb other customer transactions. You want the interviewer to be impressed with your skills, so get as detailed as you need to in order to paint a picture of how you excel in customer relations.