dialogue: #Person1#: I want to make sure my son receives this letter. It has an important certificate in it.
  #Person2#: You can send it either by certified mail or registered mail. If you only want to make sure it is received, send it by certified mail. It's less expensive.
  #Person1#: OK. How about this package?
  #Person2#: What's in it?
  #Person1#: A watch.
  #Person2#: You should insure it for the value of the watch. And send it by registered mail if it's more expensive. As it's the safest way.
summary: #Person1# will send a certificate by certified mail and a watch by registered mail.
topic: different mails