Before your customer finish booking tour using Woocommerce product. They will be redirected to check page which has default Wooocommerce fields for example. billing address, country etc.
However as you are using it for tour booking. You might want to add some additional fields for example. Date of Birth, Passport Number. You can do that easily by following below steps.
Download plugin “WooCommerce Checkout Field Editor (Manager) Pro” then install and activate it.
Next you will find option in WordPress Dashboard > Woocommerce > Checkout Form. Select “Additional Fields” tab and you will see 1 default for Order Notes.
Now you can add additional field by clicking “Add field” button. It will open a new checkout field form, enter all information and save changes.
For example, we added traveller name, last name, date of birth and passport number on our demo site.