Hi, I wanted to ask a few questions to clarify the situation. You mention you purchased Comfort+ in G fare class. Virgin Atlantic (which is coded "VS", not VA, slightly misleading) doesn't have a G fare class, so I'm guessing you bought the ticket DL flight number marketed? Did you buy the ticket through Delta or Virgin originally? You mention an upgrade to Delta One, which implies a Delta Operated flight, if so why the flight number would switch to VS marketed is a bit confusing. Was the flight operated by Delta or VS? Did a Delta Agent or a Virgin Atlantic agent process the upgrade for you? Did you use Delta SkyMiles for the upgrade or Virgin Atlantic miles?