A computer solved the over booking issue.
Here is the response.
This is an upsetting event to all of us here at United. I apologize for us here at United. I apologize for having to re-accommodate these customers.
Our team is moving with a sense of urgency to work with the authorities and conduct our own detailed review of what happened.
We are also reaching out to this passenger to talk directly to him and further address and resolve this further address and resolve this situation.