Have you received any formal customer service training?

The interviewer would like to know about any formal training you have received, related to customer service. This training could include a robust onboarding plan, on-the-job training, courses taken, or even books that you have read in your spare time. Show the interviewer that you have an interest in bettering your customer service delivery. This question is a great time to ask the interviewer about their company-specific customer service training and manuals.