Atheist parents, how do you explain death to your children?

I am 14F and my parents are both atheists. Since I was 11, I had a big, overwhelming fear of death. I have a great relationship with my parents, so I talked to them about that. They found my fear silly, because I won't be there to experience being dead. It wasn't too helpful though, because my main concern is that there won't be an afterlife and I will never see my loved ones again.

How do atheist parents explain this to their children/teenagers? Especially if they share my fear