"What?" That's... not at all the sort of reaction she expected. He sounds like he doesn't believe her, and she doesn't understand why. Her confused expression only grows more intense as he talks of labs and... building people? That's creepy.

"Are you trying to mess with me?" Honestly, that's the only thing that makes sense. "I don't know what you're talking about. I told you my name. You can ask however many times you want, and it's still going to be the same name."

Which means she has no idea what person he's apparently looking for that will make him leave... Not that she'd give him a new target in exchange for his old one.