What was Jul saying to the Dr.?

In Episode 3 Jul brings to him a Human, and it’s the scientist from Episode 2 who we thought died, but he didn’t! What do you think Jul was saying to him? I’m sure he’s gonna keep him alive so he can activate Forerunner tech/artifacts that they want. What do you think Jul was saying to the scientist.

he was saying he was going to not kill him for information.