I was looking at booking a United operated award (domestic US) in coach using my LH miles and more account; I found an option that LH lists as "economy flex" for 15K miles. However, I noticed that the award indicates: Free Seat Reservation: Not offered. Will I be able to take the PNR to the united site and select seats for this itinerary? I thought that regular economy award reservations with United do include seat assignments, though I do not have experience booking awards with miles and more. Thanks in advance.