Experience or not, it's not like angels to rely on a human for anything unless they're using them; Castiel is something of a rare breed when it comes to his faith in human beings, just how much he believes in them, and it's far easier for him to believe that an angel could be manipulating John for its own gain than to think it might be anything at all like himself.

John seems to be making it abundantly clear, however, that it isn't Castiel's problem, and he's exasperated enough with it to let the matter drop. He can't force a name, doesn't want to, so that's that then, isn't it? When John asks about Heaven, though, Castiel rolls his eyes so hard it's a wonder they don't fly out of his skull.

"You won't give me the name of one angel, but you expect me to give you the insider on what's happening in Heaven? Information is a two-way street, John Constantine, and some kinds of knowledge are more valuable than others."

A shame for him that Castiel isn't quite so doe-eyed as he might look; he's given John plenty to chew on, as far as he's concerned, and while Castiel's patience is plentiful and his willingness to help is great, he's not really getting much back, here, feels like he's had to pull teeth to get what he's gotten. And that's fine. To be honest, he's used to it, Dean can be just as frustratingly tight-lipped - but when you pretend to throw the ball enough times, eventually the dog learns that you're not actually going to throw it, and becomes disinterested. Sighing softly through his nose, Castiel fixes his gaze on a point in the distance, unfocused and distant.

"But you should be careful."