It's good not to cancel plans.
Ally had plans with Mike to go to the movies, but she has to work late.
Ally wants to stay late at work.
Ally calls Mike to see if he can reschedule his plans with her.
Ally cancels her plans with Mike and stays late at her job.
Mike and Ally are able to go to the movies the next day.
Mike doesn't want to reschedule or do anything with Ally again.