My two year old lab walks perfectly on the leash when I walk her alone. But whenever we walk with other people or dogs she gets overly excited and pulls, lunges, etc. What can I do to get her to walk calmly by my side as she usually does?

I have an alaskan sled dog(a generic term for a mutt with some husky somewhere in my dog’s case). I’d really like to be able to walk her off-leash, but I’m not sure how to train her to do that. She’s gotten good about coming when I call her to me, but what’s the next step? Any other training tips? Thanks!