LX is replacing the current PrivatAir 737 with A340 on the ZRH-EWR route from 3/31/12. Called CO today looking to book that flight after 4/1 and was told it doesn't exist. Called back and after looking into it the rep informed me that until 3/31 the flight is there but after 4/1 it just doesn't show. ANA shows the flight with availability. But interestingly Aeroplan also doesn't show it. Could it just be a lag until the system is updated with the new schedule, is it a different issue or do the agent not know what they're doing?