"You are of little help Jedi. We will leave before you wither to nothing. I have no use of a dead ally." Why yes he did just refer to Ben as an ally instead of a hostage.

"What world would be best suited for you? Though I am unaware of the changes a galaxy can undertake in 3000 years, I imagine due to the circumstances Coruscant is out of the picture. What about Dantooine? Do the Jedi still have their secret enclave there?"

He'll make his way back to the ship not looking back to see if Ben was following mostly because he was sure he'd do so anyway.