Dialog or Dialogue??

How appropriate that a word describing how two or more people come to an agreement can legitimately be spelled either way.

When I was first deciding how to spell the word for the legal documents, I had reliable people in the "dialog" camp and reliable people in the "dialogue" camp who swore their way of spelling it was the more appropriate. It was an easy decision when the helpful person at the state registering office said, "I have never heard it spelled 'dialogue'."

According to the definitions below, it takes resolve to dialog and resolve, and you can resolve to have dialog, and you can find resolve through dialog, etc. These words, like disagreements, have many differing and legitimate facets.