I just wasted an hour of my Saturday afternoon. I quickly got a Delta agent and then all my luck ran out. He patiently worked on the issue for a half hour. He found what he thought was the Vietnam Airlines PNR but could not pull up my booking on the Vietnam Airlines website. He then forwarded me to the partner desk where he said the wait was an hour. At the half hour mark, I had other things I needed to accomplish besides listenning to music on hold and hung up. I'm accustomed to the United Airlines site where the partner PNRs are shown automatically.