Eye contact means you give them DHV. It means that you are only in for a simple talk and that you are not shy to talk to them, that you are not a "nice guy" either a freak, with a big smile on your face it means also you are funny, interesting and worthy of keeping. I don't really know how to explain more than this because I don't have that much of an experience but just do it and with the proper game u'll be in that set in 1 min.
Neg-ing + giving them the sensation of "the guy they never met before" would be the thing your looking for. What makes you special from the other guys that approached her before you? Do that!
ex:"give me your hand, this is a trust game, don't worry this is the best you'll get"
do cold reading to +dhv yourself and feel her slightly uncomfortable and do jokes about her hair:"is this the best you can do with your hair? it looks like a nest of owls, everybody keeps staring at it
". do jokes about her: find something situational for example lets say she DHV'd herself saying that she's a PRO dancer:"i bet you can't dance, in fact you'd probably step on my feet "best story to tell:"I live my life with no regrets, if i'd turn the time, i'd probably do the same things i did before just to have fun again. Its best in life to try anything............ ofc there are limits and barriers. Now i'm not saying i'd go and have sex with a guy just to "EXPERIENCE" it , neither do you... you're you don't seem that fun" This way you DHV not only yourself, you also neg her, you make yourself look interesting to "ACHIEVE" for a women and she will want to DHV over you, to prove she is better than you. It's simply the competitive spirit between 2 humans ^_^. We all try to do that, it's normal, but it's more important to prove ur a Alpha Male when talking to her