It was weird to hear how he'd helped someone that he didn't even know. A part of him was even more curious about this other version of himself. Even more so about this Hermione person too. Maybe there would be something about that. Or how a version of himself had turned the girls onto one another for teaching purposes.
"I'll keep that in mind, love," he tells her. "Not much of a group person, but I'll keep that in mind."