You can create extra fields to add to booking section to get more necessary customer information for booking.
Create Extra field Set
There are 5 field types you can add.
1. SIngle line text
2. Multiple line text
5. Radio Button
Add Extra Field Set to Booking
Go to Products > Edit the product you want to add Extra field set > Extra Fields > Select Field Set > Save
Here is the result in the front end
Single line text and Multiple line text