We are trained at my work to say "My Pleasure."
It's almost natural for me to say it now, even to people when I'm out and I hold a door for them or something.


A usual response at work, for me, is "It's my pleasure, you all/you/have a great day!"

Of course, we are CONSTANTLY getting compliments for our service and customers are constantly telling us how bright we make their day. There are a few a$$es that have actually complained that we were too cheery, seriously. Well, I'm sorry you've got your head up your a$$!! I just put that up there with the same idiot that complained that we were closed on Sundays, and said that there was something we should really do about that, it is a complete inconvience to our customers.