Interview: United CEO Jeff SmisekAddis Ababa - The Federal Aviation Administration on Nov. 30 issued a single operating certificate to Continental Airlines and United Airlines, now recognized as a single entity. Work remains before the carriers fully act as one. For example, United early next year expects to begin using a common passenger services system, a milestone that would enable the merged carriers to "really look and feel like one airline," according to senior vice president of worldwide sales Dave Hilfman. Meanwhile, United continues to integrate corporate contracts with its A++ transatlantic joint venture partners Air Canada and Lufthansa, and awaits Canadian approvals to launch a transborder JV with Air Canada. United CEO Jeff Smisek last week discussed those efforts with BTN's Jay Boehmer here at an event welcoming Ethiopian Airlines into Star Alliance.