Are you booking through Facebook
You can use appointments to enable new and existing customers to book services with your business. You can accept appointments online and send reminders to customers through Messenger or text message.
You can also customize your business' menu of services, display availability and accept and manage all appointments directly from your business Page. And to keep things organized, you can also sync appointments with your personal calendar or another appointment management tool.
Appointments on Facebook are free for all businesses on Facebook and Instagram, including SMS and Messenger reminders to customers to prevent no-shows.