It's bad to cancel on someone with little advance notice.
Steve has a date scheduled with Mandy, but finds out he has to work on their date night.
Steve wants to cancel the date.
Steve cancels the date as soon as he finds out he has to work.
Steve waits until a few minutes before the date to tell Mandy he can't make it.
Mandy agrees to reschedule the date, and they have a nice time together.
Mandy is annoyed and decided she doesn't want to see Steve anymore.