Well, we’ll have to disagree.
The legitimate function of government is to prevent the use of force, threat or fraud in one party depriving another of life liberty or property.
Overbooking is fraud, and a fraudulent or otherwise illegal contract cannot be enforced; you can’t sue a hitman for not killing the subject of the contract even if you paid then not file a legal complaint against a meth dealer for selling talcum powder.
How is it fraud? The airlines state it publicly and they tell you that’s their policy. You buy a ticket knowing it could happen. You may not like it but it’s not fraud. You keep crying fraud but you have yet to explain why it’s fraudulent. Go look up fraud in a dictionary or law book and see if overbooking as conducted by the airlines is fraudulent.