Remember, the 'customer' is always right. [=never argue with a customer]
He is one tough/tricky 'customer'. [=he is a tough/tricky person]
The company has good/poor 'customer' service.
(..) on that when we get back, okay? Okay. I just don't understand. Why did our moving van even go to Texas? Multiple customer. Well, we were promised delivery on the th. Uh-huh. Excuse me. Isn't there any way you think you can even rush it. (..)2015 Inside Out