Qex,
You've gotten great feedback from Karen, jackiek, Jen, Paul, and Marcus.
The only other thing I've heard from clerks which might help is "Did you see the specials today? We have BOGOs on our green peas, would you like another bag? I'm happy to send someone to get it for you" (this is at the grocery store, assumes that I got a bag of green peas and missed the BOGO sign). I think the specials question would work provided that your place of employment has specials.
BTW, anyone who is complaining about you not interacting with them is not going to be happy unless, as Marcus notes, they can "spend ten minutes telling the checkout person about their aches and pains or showing them baby photos". Not much you can do about those types of people. They live to be unhappy.
Hope this helps!
mmouse
