Originally Posted by
Goldorak
For the seat selection, as the flight is operated by DL, the safest option is to go on DL site and enter your AF booking reference and you can then access your dossier and select a seat. This is valid even if you booked the flight under an AF code.
I had exactly the opposite scenario (DL paper, AF metal, seat map not available on DL website) and was able to go to the AF website for seat selection
however I first had to get my AF R/L from DL as it is different. OP may have to contact AF to get DL R/L for their booking.