There's nothing he can do to help her with waiting for someone, nor does he really want to if you had to ask him honestly. And now that his paranoia has given him literally nothing here, he's stuck facing her question of what he really wants with no answer.

"No, it's just -- " just what, though? "It's not often people just stalk this building." The Night Council building. Most people in London wouldn't know it from any other place.