Required Phrase: "You're kidding me"

"Excuse me? Mr. Scamander?" Luna Lovegood called.

The elderly writer lowered his newspaper.

"Hi! I'm Luna and I'd like to talk to you about your book," she chirped.

"Can you keep it quick?" he replied.

"Sure thing," she grinned. "I just wanted to ask why the Crumple-Horned Snorkack wasn't included in the fifty-second edition. It's a fascinating creature!"

There was silence for a moment before the man grunted, "You're kidding me, right Luna?"

"I'm very serious, Mr. Scamander," she protested.

"Listen, young lady," he told her. "I'm no longer writing, but I think you would get along marvelously with my grandson Rolf…"