Travel to Bangkok from Manila on Friday, have 20K Miles expiring soon. since both sectors (CX900 and CX701) are operated by 77H I was hoping to just use the miles to upgrade both flights (MNL-HKG is 20K, but MNL-HKG-BKK is 25K), when I called MPC last night they told me that the upgrade slot for HKG-BKK has been filled up.
Would there be a chance that the seats be released on check-in on Friday? I was wondering how the Instant Upgrades work and will it still depend on upgrade allocations or just seat availability?