Same-day cancel
You’re not coming. Don’t pick a new slot in the same note.
Hi Jordan — I have to cancel today’s visit. I’m sorry for the late notice. I’ll mark it off on my side.
Can’t make it / cancel today
Today is off. Say that first. Booking a new day is a different text — this one only takes the visit off the calendar.
Change the name and the time you were supposed to arrive.
You’re not well enough to work
Today is cancelled. You’ll check in when you can work again.
I need to cancel this afternoon — I’m not well enough to work. Today is off. I’ll check in tomorrow.
Short
They already know the time. You only need to kill the slot.
I can’t make our 2:00 today. Consider it cancelled. I’ll text when I’m back on the calendar.