I just spoke to AC reservations. They extended these bookings, which were cancelled pre-COVID crisis but due to expire now/next month, by 24 months from the initial date of cancellation. Of note is that should I rebook in more than 1 year from now, the ticket number will no longer be valid and they will have to look up the file in archives and create a new ticket number. The agent on the line was very helpful and informative.