Integrate to WooCommerce checkout page

Hi, your plugin is awesome.
I have a question, how to integrate it to WooCommerce checkout page?
So for the restaurant online ordering system, once the customer put orders, then in the checkout page, right before processing payment, the customer could have options to complete the order with or without reservation.

If the customer fills in the reservation form, then the data would be available in the Booking post and then also available in the WooCommerce order.

Please let me know if you have any questions.
It would be great addition to your adds-on.