The banking industry requires you to be an excellent communicator, detail-oriented and patient. Patience indeed is the key to handling customers from all walks of life. The interviewer wants to feel confident in your customer service skills. They may even ask a follow-up question, requesting an example of your abilities. Write down a couple of examples so that you are prepared to discuss your experience in depth.
"I have been working in customer service for the past four years in the service industry at restaurants and coffee shops. I have learned to stay calm when customer issues arise and listen to customers by giving them my full attention. I am very flexible and willing to work with customers to resolve their complaints, always putting them first."