Perhaps not a true secret, since most people he met demanded an explanation, but it certainly wasn't something she had known. "Alice." He repeated, testing it out. He liked it. It suited her, as far as he could tell. "Any story behind that one?" Alice in Wonderland fans for parents, perhaps?
"Only two? No chance of getting to learn more?" Being even was all well and good, but since she had obviously come to his class on accident, the chances of bumping into her again were low. Unless, you kow, he got her number or something.