The interviewer wants confirmation that your definition of excellent customer service exceeds their expectations. You could talk about a time when you calmed down an upset customer or went above the expectations of your role to make a customer want to return. Perhaps you had a customer dispute and were able to smooth over the issue using your great instinct and friendly disposition. Be sure to close with how happy the customer was when they left. Include any feedback that you received from your supervisor or co-workers afterward.

"In my previous role as a Service Station Manager, I ensured the delivery of excellent customer service by training my team to be positive-minded and encouraging to everyone around them. Customers can tell when someone wants to help them versus being forced to because it's their job. Together, we created a friendly and welcoming environment that our regular customers greatly appreciated."