I am booked on LX294 NBO-DAR-ZRH in L class (016 UA ticket stock). I can review my booking info via my UA confirmation number on the Swiss website but cannot seem to locate the myoffer option - assume that is unavailable to me. Am I correct the only upgrade opportunity I would have is at NBO for CHF 1000? If this is available, will my ticket be booked in a new fare class and on LX ticket stock?