Is it possible to select a seat on Swiss online? Can't figure out how to do it. Booked ZRH-HKG via US miles and want to try my best for a window seat (preferably 1A or 2A). (I thought to go through LH's site, but US doesn't have a LH reference number but only the Amadeus code that doesn't work. Even though I have an LH FRA-ZRH segment).