Just to clarify, I already have a OWE reservation in "M" class with CX for a departure on September 24. I haven't purchased the ticket yet and was planning to do it afer September 1. My question is:
Is my M class designation already protected through my reservation or will it automatically change to "L" class if I purchase after September 1? I'm on Asiamiles, so I am not sure whether or not it makes any difference in my case. Any comments????

Thanks,

Tim