Hopefully His First Name Isn’t John

(I work in a well-known national chain pharmacy. The particular store that I work in provides medicine to at least half of our well-sized county, so we stay rather busy and have a lot of customers. This exchange happens far more often than it really should:)

Customer: “I’m here to pick up a prescription.”

Me: “All right, what’s the name?”

Customer: “Johnson.” *or some other common last name*

Me: “Okay, and the first name?”

Customer: “There’s more than one?!”

Me: “…”