'not any more' vs 'no more' vs 'not any longer'

Hi All,

If somebody asks me whether I’m still in the lunchtime, I could answer following:

No, I’ve already finished the lunch.

But how to say it briefly?

Q: Do you still have lunch?

A: - not anymore
no more
not any longer

– are you still having lunch?
– No

Hi Atilla,

I think what lost soul wants to say is that this is not the right situation to use those expressions…