Customer: “Miss, is this a diet soda or a regular?”
Me: “Diet, sir – it’s what you ordered.”
Customer: “Are you SURE it’s diet?”
Me: “Yes, sir, I poured it myself.”
Customer: “Well, it had better be, because I’m allergic to sugar!”
Me: *later, taking the food order* “…and what would you like for dessert, sir?”
Customer: “Oh, I’ll have the chocolate cheesecake sundae.”