Had to call Delta today to get KE seat assignments. Bought tix on Delta website, but two of the 6 flights are operated by KE. I couldn't select Korean Air seats on Delta.com or KE website even though I had the KE PNR. Had to be put on hold by Delta agent for about 10 minutes until he finally assigned my seats. Now I can see my seat assignments on Delta's site, but still not KE's. I still can't view the seat map or change my seats on Delta's site.