Has A Problem Espresso-ing Herself

Customer: “I need something without coffee in it.”

Me: “Okay, what would you like?”

Customer: “Can I have a large mocha?”

Me: “That has coffee in it, ma’am.”

Customer: “No, it doesn’t. It says espresso on the board.”

Me: “Espresso is coffee.”

Customer: “All this time I’ve been drinking coffee!? No wonder I haven’t been able to sleep!”