It happens to us all the time since the new 3D payments, where clients have to accept the deposit via their banking app, then come back and confirm the booking as the last step. I feel a lot of clients miss this last confirm the booking step, but see a pending deposit in their bank so think they are booked in, then turn up for an appointment they didn't complete and we are full so cannot do it!

If they have not done this final step to confirm the booking after accepting the deposit via their banking app, why aren't they sent an abandoned cart type email to say the booking wasn't confirmed? Surely they should have this abandoned cart email at any stage of the booking journey, until they have completed the booking & paid the deposit...