answer: #Person2# advises #Person1# to change the cash to traveller's checks.
documents: #Person1#: I hate carrying so much cash with me.
  #Person2#: Don't you have a credit card?
  #Person1#: I have one but it can only be used in my country.
  #Person2#: Why don't you change the cash to traveler's checks? It's much more convenient and safer. When you are abroad, you can cash them.
  #Person1#: Well, that's great.