United Airlines won't use police to remove overbooked passengers - CEO

United Airlines CEO Oscar Munoz: "This can never, will never happen again".

In a statement released via Twitter, Mr Munoz said: "This is an upsetting event to all of us here at United".

That eventually led to the video everybody has seen - a 69-year-old man being dragged off the plane by security officers after refusing to give up his seat.

The CEO of United Airlines' parent company is pledging to review policies after a passenger was dragged off a full fight in Chicago.

The chief executive of United Airlines has issued another apology for an incident in which a passenger was injured when being forcibly removed from an overbooked flight, after initially defending the company.

"We are reimagining our airline's award-winning Global Communications Team from nose to tail", reads the advertisement for the position, which calls for applicants who are prepared to be responsible for "creating and maintaining a favorable image and brand reputation for United". Dao and Munoz had not spoken as of 11 a.m. WATCH: MUNOZ INTERVIEW WITH ABC NEWSMunoz said the incident was the result of a system failure. The attorneys also want United's protocol for removing passengers from commercial aircraft.

"I think my reaction to most issues is to get the facts and circumstances", he said. "That is something that I've learned from".

He added that the feelings of embarrassment were "palpable" for him and his United colleagues.

One of the three Chicago Department of Aviation officers who dragged Dao has been placed on leave pending an investigation.

But if the passenger posed no threat and was not being disruptive, officers nearly certainly could have tried an approach other than dragging him out of his seat and down the aisle, including simply telling the airline to resolve the situation itself, experts said.

"Specifically, the use of law enforcement aboard an aircraft has to be looked at very carefully", he said. "[Sending law enforcement] to remove a booked, paid, seating passenger - we can't do that". "We can't do that". But he did an about-face days later, saying the doctor did nothing wrong. Munoz said he needs to give frontline managers better resources and policies, so they can use better common sense.

"I don't think we need to have additional legislation to try to control how the airlines run their businesses", Ed Bastian said Wednesday.

"Currently, (Dao and his family) are focused only on Dao's medical care and treatment", Chicago-based lawyer Stephen Golan said in a statement. He also said he had no plans to resign.

"This will never happen again", Munoz said Wednesday on "Good Morning America".

When asked whether he believes Dao was at fault in the situation, Munoz responded, "No, he can't be".

"The last thing a paying airline passenger should expect is a physical altercation with law enforcement personnel after boarding, especially one that could likely have been avoided", they said.