put https://api.timekit.io/v2/bookings/reserve/extend
Extend existing reservation.
Step-1: Reserve your time
In order to extend a reservation you have to have booking slot reserved. If you do not know how to reserve a slot checkout reserving a time endpoint.
Step-2: Extend the reservation
Once you have reservation_id obtained from v2/bookings/reserve endpoint. Use this reservation_id to extend your reservation. Send new reservation_time along with reservation_id to extend existing reservation.