Now you can use BoomForm to accept registrations on WIX Bookings. Your users can see all the necessary info on the form before booking. To enable this feature you should
Open click on form and open Settings,
Go to Add-ons,
Open Add-ons
Hover over WIX Bookings and Add it to your site,
Go to WIX Booking add-on settings,
Enable it,
Choose the service you are going to use the form for and here you are!
After a user books a service through the form they will be added to the Bookings list also their submission can be found in BoomForm dashboard.
Note: Enabling the add-on will automatically add a date field which can't be edited in fields section. The field will disappear if you disable the add-on.