Color Me Stupid, Part 2

(I work at a place that sells ice cream and Italian ice.)

Me: “Hi, welcome to [Ice Cream Parlor]. What can I get you today?”

Customer: “I want something blue!”

Me: “I’m sorry, we don’t have anything blue today. Our flavors are listed on the board to your right.”

Customer: *ignoring the flavor list* “Well, then, I want green!”

Me: “I’m sorry, we also don’t have anything green today. We only have the flavors on the board.”

Customer: “You don’t have lemon!?”

Me: “Oh, I’m sorry. I thought you said you wanted green. But yes, we do have lemon.”

Customer: “Wait! Lemons aren’t green?”