I reserved tickets before for the ICN-ATL (Delta 92) flight a few weeks ago fro mar 23rd. However, I now add to add one more person to my itinerary. However, I cannot seem to be able to search for that flight anymore. I tried searching by schedule, played around with cabins, fare classes etc. The intersting thing is I am able to lookup the seat map for the flight using my exisitng reservation. Do you know what might be the problem?