Hey all, I have 2 UA award tix booked on LH J WAW-FRA-DFW, on 4/6 continuing on UA F DFW-DEN. At T-15 days (tomorrow night) I'm going to try and upgrade to LH F. When changing a UA booking online, it seems that you can only change the whole one-way trip, not just a single segment. Of course, the UA flight doesn't have award availability anymore, so I won't be able to "rebook" it. I assume I can just call in to UA to change the segment, but I thought I had read that UA agents were having problems seeing the LH first availability. Any advice/suggestions?