Now Mosaic -- Can I cancel EMS on previous reservation?
I recently became Mosaic (due to charging on JetBlue Plus card). I have a previous reservation, made when I was not a Mosaic (for a future flight) that I paid cash to get EMS. Now that I'm Mosaic -- I'd like to use points instead of cash to pay for that EMS seat (or even cancel EMS all together and hope they assign me EMS at check-in). The cost of the flight has gone up since my booking -- so cancelling and re-booking the entire itinerary is not an option. Is simply cancelling the EMS aspect of the reservation possible with no charge for Mosaics? Thx.