Create Holds before Bookings

If a rate is set as holdable=true then you must send a hold with the correct expires date time.

You can include multiple rates in a single hold as long as they are for the same supplier and products this will allow you to work with the varying ways that a supplier can build their data and streamline the booking process for a better end-customer experience. So the customer can book several rates under the same booking instead of having to make separate requests.

Also, you should pay attention to the hold times set by the Supplier prior to binding the products to ensure they are compatible with your system times, if not the case, updates might need to be considered on your end to determine the time that suits the Supplier SLA.