I usually punt with agencies or parlours, and if I want a specific time, date and girl, I book as much in advance as I can, usually when the phones go on on the Monday morning.
I assumed that strategy would work with AW girls, but I've had a couple of attempts when I booked in via text over a week in advance, texted or called them in the morning of the booking to confirm, and got radio silence.
Is there a sweet spot when you'll get the date and time you want, but they won't forget about it / decide to take the day off / ghost you for a regular?
I realise it might be different with different girls, but is there a general rule of thumb?