answer: Helen tells John he needs a passport and traveler's checks. He can use her dollars and suitcase. John is grateful and Helen says she'll go with him.
documents: #Person1#: Do I need a visa? 
  #Person2#: No, I shouldn't think so. But you must take your passport of course. 
  #Person1#: Yes, I know. I must get my traveler's check and some foreign currency. 
  #Person2#: Yes, you need the traveler's check but you needn't get any foreign currency. You can have my US Dollars, I don't need them. 
  #Person1#: Really? That's very good of you, Helen. But I must get a new suitcase, my old one needs repairing. 
  #Person2#: You needn't buy one. You can have mine. 
  #Person1#: That's very kind of you, Helen. I hope you don't mind my leaving you like this. I need a holiday. It won't be long. 
  #Person2#: Don't be silly, John. I'm going with you. It's necessary for me to have a holiday too.