I would be heart broken. I hope somebody sees it.
I left a bag on a plane in 2001 with a lap quilt that needed mending - I originally gave it to my DD for Christmas in 1987; a queen size watercolor top with a heart that was to be a wedding gift; a small finished landscape wall quilt and my small tote of quilting do-hickies. I changed airplanes mid-trip, and didn't realize I had left the bag on the plane until I got to my final destination. Delta IMMEDIATELY checked that plane, and the bag was not on it. Someone must have found it, looked inside it, and decided it was theirs. I posted pictures several times, but no one has reported seeing either of the big quilts - I didn't have a picture of the landscape one.