Here are some friendly appointment reminder message templates ^{1 2 3 4 5}:

1. "Hi [Customer Name], this is a reminder that you have an appointment scheduled with [Attendee Name] for [Day, Date, Time]. We look forward to seeing you."
2. "This is a friendly reminder that you have an appointment at [time] tomorrow with [business name] to [service description]. Please reply 'OK' to confirm."
3. "Just a friendly reminder for today’s appointment with [Doctor Name]. We’ll see you at [Time]. Don’t forget your insurance card!"
4. "This is a friendly reminder of your upcoming appointment on [DATE] at [TIME] with [PROVIDER]. If you need to cancel or reschedule, please contact our office."
5. "You have an upcoming appointment on [Day of the Week], [Date] at [Time] with [Business Name]. Please respond 1 to confirm, 2 to cancel, and 3 to reschedule."