When my daughter got her first cat, it only lived with us a few weeks until it was hit by a car.
I was just thinking about how a few years ago, we lost our cat.
user
Oh no!  What happened to it?
assistant
It was the first time he had gotten outside and he didn't come back that night. He was hit by a car. :(
user
So sad!  I am sorry.  Don't feel too bad its natural for them to want to be outside.
assistant
Thank you. I appreciate that. 
user