answer: Steven calls Mr. Green and says he wants to buy the stock of Duson because he heard that this stock would go up.
documents: #Person1#: Hello, can I speak to Mr. Green?
  #Person2#: Yes, speaking.
  #Person1#: This is Steven speaking. I'd like to buy a stock.
  #Person2#: What stock do you want to buy and how many?
  #Person1#: I'd like to buy 1 000 shares of Duson.
  #Person2#: Let me get the asking price of the stock. Just a moment. Oh, now the asking price is $ 90 each share. By the way, what is the offering price?
  #Person1#: Let me see. The offering price is near or at $ 88.
  #Person2#: Then the difference between the asking price and the offering price is $ 2. It's hard to take place today.
  #Person1#: Do you mean that I have to buy it at current price?
  #Person2#: You can decide by yourself.
  #Person1#: I heard that this stock would go up. Hum, I will take it at current price.
  #Person2#: So, now I will buy you. Are you sure?
  #Person1#: Yes, please.