Appointment: need to show available places left

So what I need is for each trip to have a max of 11 places so once they've booked (say 4 places) then the form updates to show there's a max of 7 places left/ available to book for another customer.

Then the trips will not be over-subscribed and I won't need to approve/ deny a trip.

Good day, the Appointment field does not have the option to show the maximum attendee per time slot that are left.

I have forwarded a feature request to our back-end team to implement this functionality. If this gets implemented in the future, you will be notified here.