I realize that this may only affect a small percentage of you in the future but if you should use your Delta Skymiles to book an award ticket on SkyTeam partners and should that partner cancel the flight, there is something you should be on the lookout for. Recently, my parents were booked on CI 6 from TPE-LAX but the flight was cancelled. CI rebooked them on CI 8 with their consent. However, DL never got the memo. When it came time for them to catch the first leg of their flight with a stopover in TPE, CI had issues with the ticket since DL showed no flight from TPE-LAX. They let my parents eventually board the first flight allowing them to fix the issue with DL in TPE...which meant that we were going to fix it. After 1 hr of calls to DL, CI and back to DL, we determined that all that has to be done is for DL to confirm that my parents indeed had seats on the rebooked CI flight and then manually reissue the ticket for the missing leg on DL's side. In case you experience a similar cancellation in the future, you may want to be proactive and contact DL in advance to ensure the ticket is accurate and not risk the last second panic from a missing segment on your itinerary.