From USA Today, 10th April 2017
It appears from the report that United has a proactive approach to dealing with overbooked flights
A United spokesperson confirmed in an email Sunday night that a passenger had been taken off a flight in Chicago. "Flight 3411 from Chicago to Louisville was overbooked," said the spokesperson. "After our team looked for volunteers, one customer refused to leave the aircraft voluntarily and law enforcement was asked to come to the gate. We apologize for the overbook situation. Further details on the removed customer should be directed to authorities."
https://www.usatoday.com/story/trave...ght/100276054/
Video clip below
https://www.facebook.com/audra.dicke...4378182069960/