Each module has a setting for Review, similar features can be found in the remaining modules, try to find out with Tour review options:
Go to Dashboard > Settings > Tour Settings
- Enable review system for Tour: Allow you to turn ON/OFF review form for Tour
- Customers must book a tour before writing a review: tick on this option if you want to restrict the spam comments
- Review approved: Check to the box to REQUIRE admin's approving the Review before Public
- Review number per page: Break comments into pages
- Enable review: You can also create other evaluation criteria for your Tour by clicking the button Add new or red trash icon on the right top of each option.