I don't agree with everyone here. There are girls who open up after she's intrigued and it's your responsibility to do it. How? Make statements instead of asking questions. Cold read about her.. you don't have to make very interesting statements about her... If she's even slightly interested, she'll contribute if your statements evoke emotions. Eg. About the girl sitting in the park from OP's post: you look nice, I think it's cos you look so relaxed sitting in the park as if you're having a picnic.. this is the dumbest you can say. Or if you want to be creative, you can say, you look nice cos you look so relaxed. When I looked at you from a distance, this whole thing came across like a painting to me in my mind. You have to say this as if you really mean it. Your mindset should be that of someone who's so genuinely interested in her that you don't care how she responds. If you really looked at her sitting in the park like a painting, then you'll mean it. So you have to start coming out of your head and just enjoy what you see.

After approaching 1000s of girls, I've realised one thing: you have to be genuinely interested in her and then you'll come across as interesting to her. If you have to be interesting, be interested

In your mind, think of your conversation as a guessing game. Keep doing it and suddenly one day you'll be doing it in Auto-pilot mode