Originally Posted by
fastair
Add an ARNK at the end, then place the backup segment after it. That is the way the automated CARS system does it. When cncling the backup becuase they made the earlier flight, you must cnl both the segment as well as the ARNK or the PNR will not end (an ARNK cannot be the last segmnt on a PNR.)
And if the backup is used, make sure the GA cancels all appropriate of the old segments. I recently rebooked SMF-IAH-XXX to SMF-LAX-XXX during the change, and after getting my BPs and going on my way, I did my customary double check of what the GA did because I don't trust SHARES, and sure enough my booking was:
SMF-LAX
LAX-XXX
IAH-XXX
(and then my return)
I called to get 1K, er, the Premier desk, to cancel IAH-XXX for me before it became a problem.