What Did I Order, Where Am I?, Who Am I?

(I’m working the drive-thru. A customer has just pulled up to the window and I open it.)

Me: “Hello! You had a medium fry, a side of ranch, and a side of gravy?”

Customer: “Yes!”

Me: “Okay, total is going to be [total]!”

(The customer hands me his card.)

Coworker: “Wait, that’s not his order. That order was from someone who drove off earlier.”

Me: “But I asked him if that was his order and he said yes…”

(I open the window again.)

Me: “Are you sure you had the medium fry, side of ranch, and side of gravy?”

Customer: *looks confused for about ten seconds and then says in a very unsure tone* “No…”

Me: “…”