The Cake Is A Bye

I work in a bakery. A mother and her two young sons come in to pick out cake. They take their time, but it is slow, so we joke around while the boys look around. They eventually make a choice, pay, and start walking out.

Me: “Enjoy the cake, bye!”

Oldest Son: “Thank you, goodbye!”

Youngest Son: “Bye! I never want to see you again!”

Me: “But I’m the one who sells cake!”