I’m a dude who honestly hasn’t had much experience with the dating scene myself. I met my soul mate young, and married her. So, while I have experience with women, don’t have much with the “dating scene”…
However, my BFF is a female, who is in the dating scene… So, I’m a dude who experience with getting dates has all been through a really good friend, who happened to be single, and very attractive, and got or gave a phone number every time we went out (I’m not even kidding, I was the safe married guy, who was escort to make sure she was safe, and every time we went out we got a number… Once, we even went for a walk in the apartment complex… and she got a number… It was AMAZING how often people tried picking her up. Though, she is a total bomb shell, so can’t blame them.)
From my experience as a guy with a BFF of a female who told me everything… “Raincheck” wasn’t an excuse she ever used to blow someone off, and she used it herself when she actually had plans (work, test, school, whatever). To her, the word was, “I’m not available now, try again later”. So… I would try again later, and leave the time of the date open. Suggest something like taking her to dinner, when would you have a night free? Type of thing…
As for the not interested side of things… She had two ways she delt, one… Tell them straight up, she’s not interested… Or two, just not respond to their texts any more… Depended on the guy, and how far they got in the first place.
Though… She’s had the other problem… Guys she actually is interested in, she has to blow off the first date, due to work or school, and then she doesn’t hear from them, while she is waiting for a text or call… and waiting… and waiting…
So, basically… you have her number? Call or text her, ask her out, leave it open ended… If she doesn’t respond back in 48 hours, text or call her again… She still doesn’t respond, then give up.