Aloha...I am a DL retiree also seeking advice for buddy pass riders departing out of CDG on the 27th or 28th of October. Can you give me some insight as to how the flights are worked especially in an oversold situation (does DL UPG to C or rollover to YC on other flights)? Should they completely avoid the 27th as CDG -ATL avail shows 17 in C and -26 in YC. What are your suggestions. Appreciate your input.....Mahalo!