Ah, one of those. People who think they're a reincarnated this-or-that. He's polite enough to keep his judgment to himself, at least.

"I see. Well, if ghosts ever do appear here, I'll look forward to seeing what you can do with them." In other words: He'll believe it when he sees it.

It doesn't help that in Sam's world, purple eyes are uncommon, sure, but are as natural an eye color as the more common brown, blue, and green. In his eyes, things like blue hair (he knows several people with naturally blue hair) and purple eyes are just part of normal human coloration.