As soon as she says his name, excitement stretches across his face, but he tries to hold it back. It's not working at all though; he's clearly very, very excited she's put it together.

"I can and I am!" he exclaims. "Yes, James Potter, at your service!"

And he bows in very silly, exaggerated way, almost ridiculously low, before popping right back up with a smile and a laugh.

"Nice to meet you! Err, wait now, don't tell me-" and he holds his hand up, signalling for her to wait a moment while he guesses who she is.

"Red hair...well, definitely not Lily; I'd know her anywhere. Maybe a Weasley? No, no, that's not right either. Muggle girl, probably American..."

He hmms loudly, studying her for a moment. This is the point where he should be giving up and admitting he doesn't know any American girls, but...that doesn't seem to be happening. Instead he seems a bit mischevious, though he tries to put his "guess" as innocently as possible.

"Begins with a C, doesn't it? Ch..."