On the upper level of the docks is a small detention area. When you first land on Kadara it's full of more guards beating up prisoners, but come back later and you'll find it housing an amiable human named Jim.
He asks you to deliver a message to his girlfriend, a dancer in Tarterus. Take the elevator down to the slums, and find her dancing in a cage on the upper level.
Even if you tell her you're not going to deliver a message back to Jim, your objective markers tells you to go back to Jim, so ride the elevator back up. To Jim.
Say whatever you like to him for a minor XP reward, and mission completion.