fuck-customers

I work as a self checkout attendant, and customer often think I’m a manager and complain about things to me. The other day, a woman came up to me and said, I kid you not, that our employees were too nice. She said she didn’t really think it was our business how her day was and that she’s going to call HR and report it.
Lady we don’t really give a fuck how your day is, we are just following policy.