(I work at a coffee shop in a rather posh mall. I am quite new at this job and have no experience at working before.)

Customer: “I’d like a [Coffee Beverage] to have here.”

Me: “Of course. May I have your name, ma’am?”

Customer: “…”

Me: “Umm, sorry, ma’am. May I have your name?”

Customer: *glares at me* “I’m having it here.”

Me: “I know that, ma’am, but may I please have your name?”

Customer: “WHY WOULD YOU NEED MY NAME WHEN I AM HAVING IT HERE?!”

Me: *startled* “Sorry, but we need it so that we can call out your name at the pick-up counter and give you the correct beverage.”

Customer: “I. Am. Having. It. HERE!”

Me: “I am aware of that but we still need your name, ma’am.”

Customer: *mumbles incoherently while continuing to glare at me*

Me: *writes down any name that came to mind* “Thank you, ma’am, and have a nice day!”

Customer: *rolls her eyes and walked away looking annoyed*

(I was flabbergasted and genuinely confused for the rest of the day as the customer was a regular and had had no problem cooperating on past visits.)

Me: “Here’s your new bank card. You will be able to change your PIN number at the ATM.”

Customer: “PIN number is a redundant phrase. It’s like ‘personal identification number’, number. You work in a bank. You ought to know that by now.”

Me: “You’re right, sir.”

Customer: *smirks* “I’m always right. So, where’s the ATM machine?”