Being an L2 English speaker, quite often I get into funny - and sometimes embarrassing - situations. It usually happens when I say something pragmatically inappropriate for a situation. For example, once I was on campus (in the US) taking care of some paperwork. So I was patiently waiting in line, being helped already. So a guy shows up and asks me if I am in line. And then - a terrible faux pas. I say, "I'm being served." You can imagine - those office clerks were almost rolling on the floor.
So here are my questions:
Is "be served" used in British English now? What about "help", as in They are helping me? Any difference?
In American English, when - if at all- is it appropriate to use "Are you being served?" or "I'm being served." At a restaurant maybe?