hi all,
I recently bought a ticket through Orbitz, flying with Delta, and entered there my SkyMiles number for the miles. However today I got email from Airfrance saying that my miles will expire soon

So I need to actually change the SkyMiles account to Airfrance. Luckily they have the partnership, but it doesn't seem possible to change my frequent flier info on the Orbitz system now.
Anyone has an advice about how to change this in the most reliable way? Should I try to get in touch with Orbitz or should I somehow try to resolve it with Delta in the airport during the boarding? I have a lot of miles on Airfrance (and basically none on SkyMiles), so it's important
thanks!