American Airlines launched more high-end products and services, from amenity kits to serving Champagne Bollinger, as the industry continues to court premium travelers.  As demand for economy seating continues to lag, airlines are pouring resources into upgrades for business and first-class to maximize returns from travelers willing to pay more. Over the past year, many of the major U.S. carriers, including American, announced plans to upgrade their suites with a variety of new amenities from extra room to 2 ...