You have to practice Flake Prevention by tightening up your method. There are tell-tale signs usually that warn that she's making the date, but going to flake.
Let's back up a little first. Women flake typically because they have no real interest in meeting you. They just find it difficult to be up front (they don't have the balls), so they will say "yes" to meeting you figuring they can later say "can't make it" to your voice mail or email or just not show up.
So the first step is to see why they're losing interest. Is it because you're calling/texting them 50 times a day every day? Is it because you wear your heart on your sleeve and told them all your vulnerabilities and fears? Told her your whole life story (now there's no reason left to meet you, she knows all about you and there's nothing left to find out). Is it because your conversation with them was mostly about how your ex screwed you over? Typical AFC stuff like this turns off the woman.
Anyway, when asking her out, now we get into how she's asked out: do you use a direct approach, such as, "Hey, look... Let's meet up next Monday at 8 over a cup of coffee" or do you beg for the date: "Ummm, would you be interested in getting together sometime? When's better for you? Where would you like to go?" as the latter approach turns off women too.
Assuming you've done a good job of keeping her interested in meeting you and making the date, what you want to hear is "Yes".
Anything else, as rational as it sounds, is her making excuses not to meet you. Generally, their Game Book has just a few variations, but you've heard them. Here's one:
"That sounds great, but I don't know what my work schedule for next week is yet. Call me back next week."
If she says she can't, then the next thing you want to hear her say following that is a counter offer: "I can't next Monday... but Wednesday's good!"
A woman who wants to meet you works with you to meet up.
Now, if you hear anything like this:
"Okay! Next Monday! Sounds terrific! Just call me Sunday to confirm." Then that's her setting it up so she can cancel by Sunday. You're not going to accept that date because come Sunday, guess who won't be answering her phone.
Instead, to any such excuse, you simply say, "Hey look, why don't we do this another time when you know your schedule better?" and say your goodbyes and get off the phone and move on to the next woman's phone number. If this one starts to wrangle with you about it, "Oh, no, no, I want to meet up with you..." just keep to your guns. They hate to look bad and they'd rather suck you back in even if they still intend on flaking.
That's the skinny on Flake Prevention.
Here's a personal example from last week... She had given me her number ("let's chat!") asking me to call her. So I finally did, and we chatted a little, fun, silly banter and...
ME: Hey, look... Let's meet up. I have a small window of time, could meet you for a little bit next Monday...
SHE: [interrupting me] Oh! Next Monday I have a business meeting at night! Is there another day that's good?
ME: No, 'fraid not, kinda crazy week. Well, let's touch base another time then.
SHE: Yes! Call me!!!
But I see in this good reason to think she just wants attention, someone to chat with on the phone, and doesn't really want to meet me.
Did you catch why?
It's because when I mentioned that I had a LITTLE AMOUNT OF TIME on Monday to meet her, I never got so far as to tell her EXACTLY when that time would be - but she immediately jumped in to tell me why she couldn't meet me on Monday night at all. I could've been thinking of 5 PM. Or lunch time. She never said, "Well it depends on what time. I have business meeting at 7, I could meet you at about 6.."
Then she didn't counter offer with a specific day and time, just an invite to call back again. More chat! I'm thinking AW.
It's these kinds of set ups that usually flake.
When you practice this Flake Prevention, you'll feel better.