Hello @United, need help with Premier Exec Gold traveler, traveling in 005 CO ticket, we can't exchange return? # A client in biz class bought tkts on CO, now on revalidated UA flights, he wants change return. We can't do even exchange. #United # Based on the tweets in @United queue, lots of unhappy travel agents and Premier members. #United #merger # Still waiting for response from @United, need to do partially-used intl even exchange of CO ticket to UA, orig issued 02MAR12 # #United merger not as smooth as NW/DL merger. We could exch NW tickets for DL for…