You use the to calm him.

"Please, let me explain." you say calmly.
He continues to glare at you, but you can feel his anger lessening.
"I do not fully represent the Jedi, I follow my own rules when I want. Trust me when I say I can help you a lot. If not, I'll leave and we'll never see each other again."
"Fine." he growls, "What do you have to offer?"
"I have a lot of power, I am a very skilled fighter, and I know many things about the galaxy that can help you. I can also bring allies."
He ponders for a moment, then says, "Very well. Follow me."
He leads you into a building, and down a dark corridor. He stops in front of a door, and knocks.
"Enter." says a deep, rumbling voice.
He opens the door, and you follow him inside. You find yourself in a dimly lit room, facing a huge, slug-like creature. It is a Hutt.
It is 91st in command in the Hutt Cartel.
The Hutt looks at you, its eyes glowing red.
"Who are you, stranger?"