rescheduleverb
To change something that was already scheduled to another date or time.
let knowverb
To tell someone something they need to know.
cancelverb
To call off something that was arranged or planned.
cancelarcancel
I have to cancel tomorrow night's dinner.
avisarlet know
I want to let you know today so you don't wait for me.
reprogramarreschedule
Can we reschedule the dinner for the weekend?