# Flow of information

Wherewolf will regularly fetch a list of bookings for a time frame from the booking system API. This list is used to fill the list of expected guests for a day and to fill a calendar that helps with operations.

Learn more about this on [Bookings endpoint](https://wherewolfnz.github.io/docs/integrations/endpoints/bookings.html).

To speed up this process, the booking system provider can execute a Webhook call to notify Wherewolf about new or updated bookings.

Learn more on [Booking Created or Updated webhook](https://wherewolfnz.github.io/docs/integrations/webhooks/cache.html).

Once a guest has finished the check-in process, Wherewolf will inform the booking system that a waiver has been signed by executing a webhook call.

Learn more on [Guest update endpoint](https://wherewolfnz.github.io/docs/integrations/webhooks/cache.html).