When chatting is important to have a sense of humor, make jokes and laugh, but try do not mock, disrespect or be rude. Keep in mind that if you can bring a smile to the person you like is a fact that you will want to spend more time with her, and it will achieve a relationship of trust and will soon be able to chat about anything.
When you talk with the prettiest girl you like more, try not to talk about you all the time, because what better to conquer a woman is learning to listen and show interest in everything she says. When it will be your turn about speaking about yourself do it without fanfare, do not flatter about yourself… because it results unpleasant for anyone.
Finally, remember that when you talk to a girl you want to impress, you must not use vulgar vocabulary or using profanity words. Do not talk in the same way as you do with your friends. Every woman deserves special treatment and being careful about the kind of language you use, it will be the final result you will get with her.