He's surprised about the amount of relief David's teasing brings him. And at how much that easy phrase of appreciation warms him.

"I take good care of my treasure," he agrees. And then he slips away. All in all, it takes a half an hour or more to get back to the expo, find Angelica, retrieve David's things, and come back. Once he has David's phone, he also calls the front desk of the hotel requesting two keys be left for his contact, Balthier, so he can grab those on the way up and not rifle through David's things.

He knocks on the door before opening it just enough to slip in, presuming David will be in some state of undress.