[There's no sarcasm hidden in Kazuya's words, and if anything, he really does seem grateful, and impressed by the others clear confidence in himself, and certainly not put off in the slightest.]

I'll definitely let you know. I don't want anyone wasting their time on something I've already solved. And I'll definitely let you know if anything else comes up that I need help with.

[Friendly, and with a small laugh, he reaches out, patting Varian's head in a reflexive manner. The earnestness is charming, and so is how reliable he's making himself seem. The gesture doesn't last too long, though.]

My network username is just three cat emojis. Not sure why I picked it, but I've got pretty good taste, I think.