Last week, I flew ORD-SFO-ORD in F. AA cancelled the outbound flight the day prior and I called to re-book. The agent inadvertently cancelled my return which I discovered while trying to check in online. I called and they managed to get me on the same flight but in a window seat instead of aisle. After talking to her supervisor, the phone agent offered me a $50 voucher and told me I could probably get more if I wrote to them. I told her that I just wanted to move on and I would accept the voucher.