history: While I was in college my dog ran away back home and was never found.  My mother had been taking her on a walk in a park and my dog fell down a cliff.  I dreamed about her every night for a month at school, and hoped I'd get a call saying she was found, but she never was. My dog disappeared while I was away at college.
current: That's so sad, I'm so sorry you had to go through that. How did it happen?
next: My mother was walking her in a park and the dog fell down a cliff.  She was never found or recovered.