You ever wonder why you see hot girls and loser guys? Because the good looking guys let their egos fuck with them. They don't call back, they try to play games and they end up fucking some fatty instead.
You like this girl? then call her, if she is busy tell her you can spare a minute and say this
"I really want to take you out. I'll pick you up at 7:00"
Don't ask her if she's free, don't ask her what she wants to do. Just fucking CLOSE THE DEAL.
Coffee is for closers....