This is a continuation of another ManyChat template. Check it out here. Using this scenario, respond to a user on a ManyChat bot when the name of a Google Calendar event is updated to accept or reject an appointment. A flow is sent if the slot is available, a message is sent if it isn't, and a tag is added if the slot becomes available last minute.
This is a predefined template that will make the creation of your scenario much easier. Of course, you can always expand and customize the scenario to meet your own individual needs.