Anya and Xander in “No Place Like Home”

[to a customer who just finished her purchase] Please go.

Anya, the Shopkeepers Union of America called. They wanted me to tell you that "Please go" just got replaced with "Have a nice day."

But I have their money. Who cares what kind of day they have?

No one. It's just a long cultural tradition of raging insincerity. Embrace it.