Last-minute cancellations and changes can entail serious monetary risks for the client and the service provider. Whatever the reason for canceling, sometimes it comes at a moment when some or most of the expenditure has already been made.
Lately, we have been several times in a situation where a booking is made for a time-critical solution and due to time pressure, you just have time to put down in an e-mail the bare minimum. When, where, and how much it will cost from A to B. But then the original booking gets changed or canceled in the process.