Never received an email message such as this before, as anyone else experienced one like this? We have an important message regarding your itinerary for United flight UA875 to Bangkok, THAILAND on 10/4/2012. This flight was originally scheduled on an aircraft with an updated seating configuration. However, in an effort to prevent a flight delay or cancellation, it was necessary to switch to an aircraft without these updates. We apologize for any inconvenience Update: I notice this flight was canceled today, Tuesday Oct 2 reason given Operations.