In this video we will teach the dog to get to us when using the command come.  The idea is every single time the dog get back to us he gets a high value treat like meat, cheese, peanut butter.
(Warning! 2 ingredients only for peanut butter: Peanuts and Salt.)
You want to be more rewarding than the environment.

This command has to be trained a lot but few repetitions at a time but couple of times a days. The more you practice that the better your dog will be on that command. You can use it for a recall.