"Oh, I've spent many a sleepless night in Tevinter back when I was an apprentice." Dorian has reached that point where he could either force himself to stay awake until the sun came up or fall asleep standing up.

It's a relief that Cullen offers him a room. Sleeping standing up wasn't very comfortable. While he has explored a great deal of this place looking for supplies he keeps to Cullen's heels. No sense in risking getting lost.

"How do you plan to do that?" he asks, "Most of your city is refugees and the poor. They have no coin or they would've left already. Will you reach out to the Carta? Although, some dwarves may want to help if a Magister from Tevinter asks. They're the only people we still have any sort of treaty with."