United Airlines CEO Oscar Munoz said on Wednesday that he felt “shame” when he saw the viral videos of a passenger being dragged from his seat on a Sunday night flight. He apologized to passenger David Dao, his family, flight passengers and United Airlines’ customers and employees.

“This will never happen again on a United Airlines flight,” Munoz said on Good Morning America.

Munoz received heavy criticism for his handling of the passenger removal. Many said the company’s first public apology was not remorseful enough and criticized his letter to employees which lauded their behavior and keeping of procedure. 

While there have been calls for his resignation since the incident, Munoz said he is not leaving the company any time soon. 

“I was hired to make United better, and we’ve been doing that,” Munoz said. “And that’s what I’ll continue to do.”

Dao was forcibly removed from a Louisville-bound United Airlines flight on Sunday to make room for crew members that were needed in Louisville the next day. His attorneys say he is undergoing treatment in a Chicago hospital for unspecified injuries.