I guess we can ignore everything that came from anyone who said that Rey gives Finn his name. I remember more than a couple of people claiming to have insider info included that in their story.
Maybe not though. The editing on trailers can be deceptive, and I suspect this will be the case with this film a LOT. For instance:
Rey: I don’t know your name.
Finn: I don’t have a name. I’ve always answered to FN-2187
Rey: That’s not much of a name. Why don’t I call you Finn?
Finn: (Slightly miffed) Finn…
Rey: Nice to meet you Finn. I’m Rey.
Bit convoluted, and I have no beliefs about it one way or the other, but just proves things might not be what they seem. 😉