[mcpackieh]

Nobody expects a delivery driver to ask "how can I help?" because their job isn't to take requests. They expect that from workers who's job is to take requests. A simple smile and "what can I get you?" from somebody taking food orders or the like is the expected norm in most of North America.

It's just common decency. Imagine I'm having a bad day and go to shop to get lunch where I meet a worker who's also having a bad day. We could both smile and say hello/thank you and go about the rest of our days, or we could both lay into each other and make our bad day the other guy's problem. If we both choose the first, we both benefit. If we both choose the later, we both come out worse. So which is better?