Here's the story:

I hold the last D seat on CX261 (HKG-CDG) - this reservation is being rated by AA, but I don't think they will make the purchase deadline so I'm looking to book with CX instead.

Given that this is the last seat, how do I make an alternative booking with CX, without having the seat released for general sale or to the waitlist, i.e. so that I don't lose it? Any work-arounds for this situation?

Cheers for your help guys, this forum is a goldmine of airline wisdom.