Send a reminder for a real appointment
An SMS reminder belongs to an existing booking. Use the current date, time, time zone and location or call format. Read those details from the booking record so a rescheduled appointment does not receive an obsolete reminder.
Make changes easy to resolve
Keep the message short and identify the sender. Provide the agreed way to cancel, reschedule or ask for help. Confirm whether incoming replies are supported by the selected setup; do not invite replies to an unmonitored number.
Check cancellations and attendance
Suppress reminders after cancellation and replace outdated scheduled messages after a time change. Delivery confirms a technical event, not attendance. Compare attendance against eligible booked appointments and review message usage costs separately.