Booked CDG-JFK/JFK-BOS-CDG Earlier this month. Delta 006 ticket stock. CDG-JFK Air France coded flight on Premium Economy (S), JFK-BOS-CDG Delta Coded flight on First/Business (F/S). No O availability at the time of booking, but was ok with either waiting or flying PV. Today some availability on O appeared so called Delta Ticketing Office in France. They confirmed the availability, and got the ticket upgraded right away.

I asked the agent to reissue my ticket, but he said it's too early (flying out on Dec. 23) and it will be placed on the Queue. He also said that I was going to be charged the departure luxury tax. As he is being reluctant to reissue the ticket, can I just call Delta later and get another agent reissue it?