I run a Wedding Services startup and we have been facing this issue for quite some time - Our customers delay the time which was allocated to them for taking the service. For e.g - Someone taking a Bridal Makeup Service books the slot from 3-6 PM but reaches at 4:30 PM, we have service professionals who have bookings for other slots when one job is done. Due to one delay all our consecutive services gets delayed.
My Question is How can we make the customers reach/start the service on time? If not is there any penalty like thing which we can impose so that customers reach on time.