Step 1: Setup quantity for a Car.
When make new product, you have to choose list vehicle of product
And choose total vehicle. If you choose 3 vehicles, you have to insert 3 here.
Step 2: When the customer booking a product, the system will store in manage booking
For example: like above image If has a customer booked 3 cars from 20 May 2020 to 23 May 2020, so other customer can't book car in this date.
Step 3: If the admin want to cancel a booking, he have to chooser Cancel Order in WooCommerce