What is the best way to train a puppy sled dog?

This dog is not mine, she is my girlfriend's parent's. I like to take her for walks in open fields though. I'd like to let her off of her leash, but I'm afraid she will just run wild and I'll never get her back. For now I just want her to have my attention, listen to me, and stop yanking on my leash. I know she is a sled dog, but she still needs to know some commands! She is only a year old by the way, so I'm sure she can still be molded! Thanks!