answer: Miss Thong tells #Person1# the differences between a letter and a memorandum and says it's not necessary to use the layout when writing a memorandum.
documents: #Person1#: Can you tell me the differences between a letter and a memorandum, Miss Thong?
  #Person2#: Certainly. A letter must be sent out of the company and must be mailed or posted. A memorandum is a communication within an organization.
  #Person1#: Should we use the layout we use for a letter when we write a memorandum?
  #Person2#: No, not necessary. Usually we have a set form which is printed. We just fill in the printed forms and send it to the person or the offices concerned in the company.
  #Person1#: Of course, let me find one for you.