answer: #Person1# asks #Person2#'s help in writing a letter to clients and #Person2# teaches #Person1# to write the start and the reason for writing and teaches #Person1# how to ask clients to reply more politely.
documents: #Person1#: Can you help me for a minute?
  #Person2#: Sure, what I can do for you?
  #Person1#: I'm try to write a letter to one of our clients, But I just don't know exactly what to say, I don't even know how to get started, I know I should write dear Mr. Mrs. or Ms. , but the problem is I don't know the name of contact person.
  #Person2#: You can just put Dear Sir or Madam, officialese not personal, you can write to whom may concerned.
  #Person1#: OK, So I first thanks them for their business, I can say something like we are very grateful for your continue support, How is that?
  #Person2#: Good! But also, write off the bed you want to tell them the reason of your writing, give them more reference.
  #Person1#: Like Regarding our new product line, we would like to announce a special price discount
  #Person2#: Right, do you need them to respond?
  #Person1#: Yes, the letter would have a survey inside, and they should complete it and return to our office. How should I write that?
  #Person2#: You can tell them ' Please finding the enclosed customer service survey, else also, you can say Attach a customer survey. If you need resource it right away, you can tell them the urgent by saying Please return the survey without dely as soon as possible. Maye it more polite with this as early as convenience.