And as always, the unstated first rule of UI is: Also use common sense :) E.g. in this case, the first option should be "Cancel Flight" or "Yes", and the secon

And as always, the unstated first rule of UI is: Also use common sense :) E.g. in this case, the first option should be "Cancel Flight" or "Yes", and the second option should be "Do Not Cancel" or "No", though I'm sure there are other reasonably explicit options. Edit: We each made essentially the same suggestion as an edit to our posts at the same time. The only difference is that I consider this an exceptional case. I still contend that "Do Not XXX" requires more thinking than "Cancel" when there isn't an obvious semantic conflict. You say "if you are already thinking of an explicit verb...", but I am not concerned with saving myself cognitive effort - I am concerned with the user. Edit: Also, note that this is all tangential. The only point I was interested in writing about at the top of the thread is that, when you do see a "Cancel" button, it should never be destructive.