Im travelling with a friend in Y (im in C) and i wanted to use some of my miles at the airport to upgrade her. There are currently no seats available online for upgrade, but expertflyer shows that the flight isnt full.
When i called EK to ask was this possible to do at airport i was told that it was not possible, i could only use miles to upgrade myself at the airport because we are on seperate bookings.

Anyone ever done this?