I don't know if this is the appropriate thread to ask but seems this is the most relevant one for the question.

I am planning to spend 2-3 weeks in Europe and just checked the earliest available flight from HKG to LHR is on 25th Dec (redemption J ticket). While I had some experience trying for a go show in HKG years ago, those were SDC but not days before departure. Are there any recent DPs that anyone being allowed or denied a go-show for a flight several days ahead of the original flight? I have heard AM tix can attempt a go-show whenever the desired flight still has empty seats but that was years ago.

Assuming no status with CX, departing in HKG and tix is issued by AM.