Me: “Medium size latte for Sarah!”

(A customer approaches and looks at the drink.)

Customer: “Oh, sorry, I didn’t order a latte.”

Me: “I’m really sorry about that, Sarah.”

Customer: “I’m not Sarah.”

Me: “You’re not Sarah and you didn’t order a latte?”

Customer: “No.”

Me: “I’m really sorry, but this isn’t your coffee…”