MADBOB.... Yes,looks like 79 is gone. While it still shows up in the CRS, availability is zero'd out on all classes. This is first step towards cancellation (prevents new bookings).
The response you got from Plt desk is similar to the response I got on Flt 78 when I called. I pressed the agent and he called for help, when he came back on the line he acknowledged that it looked like the flight was being cancelled and we worked on rebooking.