[ The initial answer does strike Illya as a little strange - but pointing that out with people she's comfortable with it is one thing. Pointing it out to a stranger? Please, she'd probably die from nerves.

And it helps that the other does correct herself a moment later, giving Illya the chance to actually understand what she's trying to say. ]

H-Haha, I see..

[ .. even if it's with a hint of awkwardness in her tone. ]

It seems like you know more about Tanabata than I do.. I'm usually not the one getting the papers and everything ready when we put everything up for it at home.