As K dog says if you try and tailor your conversation to her and what you think she'll be interested in you're going to sound rehearsed and fake. It's not the real you coming through so just be confident and waffle about any shit that comes into your head or you find interesting. It's more about how you do it than what you say, she'll find it more attractive and refreshing that you're not trying to impress her or put her on a pedestal like every other guy that talks to her.