I'd rather look at non-verbal cues, since they disclose more than actual talking and a lot of it happens subconsciously.
- Does she pivot her body towards you?
- When she averts her gaze, does she look down and back at you? Up and back? Side-ways?
- Does she recline her head when she listens to you?
- Does she frame face with one hand/two?
- Neck play: while she reaches and touches her collar-bones/neck, she's displaying submissive behavior, something that brings mens nurturing instinct kick in. Same with covering her mouth (if she doesn't look disgusted otherwise): a no-go for men as a general rule, while it signals being 'coy' and 'exploitative' (no, it's not the exploitative you think; again, this vulnerable display makes men want to protect women)
- Touching is probably the most reliable sign; if she graces your arm or maybe your thigh just below the wasti both indicates the same thing with different intensity.
- Signs of preening? Straighten up her posture, opening up body language and so on.
- Turning her head to the side while laughing; something that almost all men find extremely attractive.
- You have counter-intuitive signs as well, such as a closed body language (both arms covering her up) while her focus is on you. S Generally we think about submissive as in fearful or insecure, but here we're back at Caveman town again - men (who are not damaged) will want to protect and take care of her.
.. and there are countless more, but as long as she doesn't look appalled, these are generally pretty signs that she likes you.
All of these are pretty vanilla, but it's a starting point.
You can't apply all of them to every individual, but if she likes you I guarantee she'll dot in several on a date.
But that she's interested doesn't mean the deal is done.
You still gotta close the deal, and that comes down to the lady in question, what she might want, be looking for and what you have.
Just sweep her of her feet and live happily ever after!
You gotta take more than just this into account, though. Her touching her neck or pivoting towards you are not Go-signs by themselves.
These are just small things to look for. The best way to find it out is to simply communicate. And the only way to learn that is to TALK.
Whatever you do, though - drop "The Game" and sleazy Bollywood-manipulations like that. That's not a healthy frame to put yourself or women in.