I have done a couple of these, you have to wait for the associate to offer you fries and a drink.... order one or the other and then wait for them to offer you the other one.
ex:
me: I'll have a hot dog please?
Associate: would you like fries or a drink with that?
Me: Oh, ummm ya, could I have a little fry?
Associate: Sure (unnerving pause) would you like a drink?
Me: Oh, jeez, yes, please, a diet.
at least that's what my guidelines here state....
O.o o.O
Happily shopping New England and beyond!!!!!