(I work in a buffet restaurant, mostly serving pizza. The customers pay at the register when they come in.)

Customer: “Can I get a to-go box for my leftovers?”

Me: “Well, you have to pay extra for anything you want to take with you.”

Customer: “Why? I already paid at the door when I came in so this is my pizza on the table. Why do I have to pay more for it?”

Me: “Because the buffet price is only for what you eat here. We can’t afford for people to eat here and take food home with them for another meal.”

Customer: “I’m not stealing if that’s what you’re trying to say!”

Me: “Ma’am, are you full? Are you finished eating?”

Customer: “Yes!”

Me: “Then you have had all you can eat. That’s all you paid for.”