"I repeat! I can't ensure you what will happen after this interrogation! Furthermore, you aren't in the position to barter!"
Sid remains in his decision, he can't end up to agree with an enemy. This isn't a frontier place, it's a prison. The Kingdom of Bretonia rules this base and doesn't accept compromises from anyone.
"And anyway, I just ask you a question, for now I never threat you! You started!"