answer: #Person2# is sad because #Person2# has lost all the files from the computer. #Person2# can buy a new computer but the digital data can never be restored. #Person1# tries to console #Person2#.
documents: #Person1#: What's wrong with you? Why do you look so sad? 
  #Person2#: I've lost all my files from the computer. It's a total disaster. 
  #Person1#: How did that happen? 
  #Person2#: Three days ago, my laptop went on strike. I couldn't enter the Windows system. As I was about to give it up, one of my friends advised me to start Windows in the safe mode. 
  #Person1#: Was it helpful? 
  #Person3#: Yeah, I could barely get it started using the safe mode, but when the computer was connected to the internet, its hard disk roared a harsh rasping sound. After a while, it crashed into a coma. 
  #Person1#: What a pity! 
  #Person3#: Yeah, I can buy a new computer, but the digital data can never be restored. My digital photos vanish forever. Audio recordings of Grandpa are slienced forever. 
  #Person1#: That's such a big loss. 
  #Person2#: Perhaps I should be blamed for simply taking it for granted that the digital will always be in safe hands. I've neglected the potential risk of losing it. 
  #Person1#: Don't blame yourself. We all make the same mistake. The digital information we all rely on is actually very fragile.