Harry hated to answer; Draco seemed in rather high spirits, and he obviously wasn't looking forward to the invasion of his mind, nor of the disappointment (and likely lectures) that would follow once the work actually began. He found he had even, dare he say it, been enjoying this idle chitchat.
But as all good things must come to an end, Harry replied, "You must be in a good mood, asking before attacking... Yes. I'm ready."