At the small cafe where I work, both of our registers are being used but the phone rings, so I answer it to put them on hold.
Me: Thank you for choosing [Cafe], can you hold for just a minute, please?
The caller ID had not kicked in, so I didn’t know that this was one of our brattiest customers.
Her: Well, actually, I’m driving, so, um, no. I’d like a Beach Bum with dark-
Me: Ma’am, there’s no way I can take your order until I finish with this one. You’ll just have to wait.
She hung up!