This is Misc. Option section. Under this section, you will get the option to manage the Enquiry option.
Available options:
- Global Trip Enquiry Option: This option allows you to enable/disable the Global trip enquiry option. If you enable this option then, the setting will be from the WP Travel > Settings > Misc. Options.

For more details regarding adding Trip Enquiry Option in Trip Page In WP Travel, please watch the Youtube video: