Welcome to FT.

No offense - if airlines starts making accommodations for this kind of issues, the airlines is going to bankrupt.

I am sorry that your girlfriend sustained an injury. You want a free upgrade? Sure - but you have to be more convincing, like going to honeywell. It may work. Ankle sprain? Not really.

But it is not hurt to ask providing you don't mind embarrassing yourself.

BTW - airlines look at each person individually. Her father's travel pattern does not matter. As a matter of fact, a lot of people in here actually travel about 5-6 times between NA to HKG each year. Her father's pattern are light-weighed.