Or perhaps the airline made the change. I was checking out airline seats prior to a flight that we had booked months in advance, and had carefully chosen seats for. The aircraft was almost empty when we booked. Imagine my surprise to see us scattered all over the plane! I called and asked what happened, and was told that the size of the aircraft had been changed, and seat assignments were changed. Ummmmm, change us back! The rep told me he could move a few of us together, (my DGD had experienced a terrible flight and was very anxious, so I wnated her with her parents) and did the best he could. We are adults, so no issues, and he did get my DD DSIL and DGD together, so it was fine. But the airline made the change, not us. He also told me that they kept seats open in case there were kids and they needed to be seated with parents.