When you buy an airline ticket or cruise passage, you enter into a contract. What does that contract cover? Does an airline owe you compensation if they overbook? Does a cruise ship have to give you a refund if there is a mechanical failure?

A Consumer Guide to Air Travel from the U.S. Department of Transportation

https://www.transportation.gov/airconsumer/fly-rights

Cruise Industry Passenger Bill of Rights

https://www.cruising.org/about-the-industry/regulatory/industry-policies/other/pbor