red bank tape

My daughter called me at work to say I was to phone Ian at my bank.
The operator asked me what Ian's last name was and I explained that he hadn't left his surname.

When she asked for his department, I said I didn't know.
"There are 1500 employees in this building, ma'am," she advised me rather curtly.

After a few more brusque comments, I asked her for her name. "Danielle," she said. "And your last name?" I asked. "Sorry," she replied, "we don't give out last names."