Decaffeinated Milk

(A customer comes into the store and confusedly finds his way to the register.)

Customer: “Get me a steamed milk.”

(I make the drink and hand it to him.)

Customer: “This is just milk. I wanted coffee in this.”

Me: “No. You ordered steamed milk.”

Customer: “Don’t you guys put coffee in everything?”

Me: “No.”

Customer: “What has coffee in it?”

Me: “Coffee.”

Customer: “Oh! That’s what I meant to get.”