Don't be sad, no one can get a reservation, and if they do it's close to the 180 day mark.
But, as a PP said, you can get in for lunch for QS. We were there this weekend, when we checked at BOG there was only one cancellation but we would have had to wait 3 hours to eat. Our friends went back for lunch and they enjoyed it.
You can always check with the BOG podium to see if there are any cancellation.