True, nothing actually acknowledges this, but rather implies Rey is Luke's daughter, I mean, look at all the parallells they're making. It's funny, because they're both visual (so shots in certain scenes) and part of both characters
Do I need to write some down?
Sandplanet, no parents, good at flying, good at fixing machines, share some personality traits - both are kind-hearted despite growing up in harsh environments, they are both brave and reckless, and both are kind to and fond of droids...
The reaction to the Falcon is more or less the same: "What a piece of junk" vs "That one's garbage"
Han offers Rey a job on the Falcon, as he did with Luke in Episode IV. "Chewie kinda likes you" Well he kinda likes both.
In the climax of the films, both Luke and Rey close their eyes to “let the Force in” (Death Star, Kylo).
If you want to read more of this, I suggest you search a bit on Google, it's full of literally all parallells people have found until now.
According to the novel, Kylo Ren "unlocks" something in Rey's mind that didn't know she was Force-Sensitive, Kylo sees this as a sort "wall" he cannot penetrate. But I thought I'd read somewhere that by the trying of Kylo, Rey discovers this and becomes aware.
Don't know if I've got to put spoiler tags around this, if someone isn't okay with this, I'll edit it.