The only thing slightly similar is that I booked a return flight Manchester to Hong Kong, and then on the return segment needed to goto Nice, so bought an award ticket from Charles de Gaulle to Nice. I checked in for both flights, and since I was travelling hand baggage only, arrived in Charles de Gaulle and got onto my Nice flight instead of my Manchester flight. Unfortunately I dont know the selfish repurcussions for the CDG-MAN flight and its passengers for me failing to turn up, but I reached my destination and never heard anything more. This was in July.