answer: #Person1# decides to send a small parcel to Canada by sea after asking the difference between the airmail and seamail.
documents: #Person1#: Can you help me, please?
  #Person2#: Sure, if I can
  #Person1#: I want to send this small parcel to Canada.
  #Person2#: By airmail or seamail?
  #Person1#: How different are these rates?
  #Person2#: Your parcel weights 420 grams. So it is 21. 3 dollars by air, or 6. 9 dollars by sea.
  #Person1#: How long it will take by sea?
  #Person2#: About a month.
  #Person1#: Then, by sea, please.
  #Person2#: Please fill out this form, and then take your parcel to the counter on my left-hand side.
  #Person1#: All right. Thank you very much.
  #Person2#: Not at all.