i work at giant retail chain in the electronics department. This happened about an hour ago.

Customer:"I'm calling to see if you have a micro USB to HDMI adapter"

Me:"No, we do not"

Customer:"you answered that pretty quick"

Me:"We get asked for that item alot"

Customer:"Do you know if another store has it?"

Me:"you could try other retail store or other retail store"

Customer:"No, im asking if you know if there's another same retail store location that has one?"

Me:"No, i've not seen another same store with one"

Customer:"Thank you, i know that comprehension is an issue for you"

I didnt know what to say, because that comment actually made me a bit upset, because i feel it was uncalled for, especially after another remark i got from a customer a few minutes earlier (didn't post that one, probably wont). Anyway, i replied

Me:"Have a Nice Day" in a bit of a stunned tone, then the customer hung up.

EDIT: I forgot to mention, the customer was calling because they found the item on our website, which our website sells a lot of third party items, but checking store inventory is usually available on items that we actually carry.