This might not be quite what you're looking for, since it's an MMO, but there's a lot of unique quest dialogue in Runescape for those who know what they need beforehand - whether because they've done it before or because they're following a guide.
For example - Doric's Quest - a simple early game quest where he asks for some items:
Player: You know, it's funny you should require those exact things!
Doric: What do you mean?
Player: I can usually fit 28 things in my backpack and in a world full of quite literally limitless possibilities, a complete coincidence has occurred!
Doric: I don't quite understand what you're saying?
Player: Well, out of pure coincidence, despite definitely not knowing what you were about to request, I just so happened to have carried those exact items!
Doric: Oh my, that is a coincidence! Pass them here, please. I can spare you some coins for your trouble, and please use my anvils any time you want.
There's even an extra line about having the exact quantities of the items if you aren't carrying anything extra.