I was going to put this in civil-av, but thought better of it... since the source is completely unreliable (but very funny anway).
A friend heard it from a friend (get the picture?) that on a recent UA flight, upon landing, the FA concluded her "welcome to" announcement with:
We know you have a choice when it comes to bankrupt airlines, and we appreciate you chosing ours.
Like I said, dubious source, but funny none the less.