answer: Miss Wang will attend a conference and visit friends in the U.S. Bob Jones determines Miss Wang's eligibility for a U.S. visa and tells her a regular visitor's visa should suffice.
documents: #Person1#: Hello miss. Can I see your ticket number?
  #Person2#: Sure, here you are. And here are my application forms as well.
  #Person1#: Thank you miss. . . Wang. I'm Bob Jones and I'll be handling your application.
  #Person2#: Nice to meet you Mr. Jones.
  #Person1#: The first step is to determine your eligibility for a U. S. visa. Let's see here. . . you're applying for a special business visa. Why is that?
  #Person2#: Well, my first order of business will be attending a conference in Seattle, but after that I intend to spend two weeks visiting my friends. I assumed a business visa would be required.
  #Person1#: I think a regular visitor's visa should suffice. With this visa, you can stay in the United States for up to 90 days.
  #Person2#: So I can attend conferences and do business on that visa?
  #Person1#: Yes. You are free to do temporary business with this visa. If you were planning on setting up a new business in the U. S. you might need to apply for a long-term visa.
  #Person2#: Oh, I see. I think 90 days is more than enough time.