dialogue: Susan: Bill, will you be free at noon?
  Bill: Yes. What can I do for you?
  Susan: We need a new filing cabinet in the office. Could you go downtown with me after lunch?
  Bill: All right. Have you got an idea about what type to buy?
  Susan: Yes, the same as the one we have. And we also need some small articles in the office, such as pens, clips, erasers and sticky notes.
  Bill: Can you remember them all?
  Susan: Susan has already given me a list of all the stationery which we need to buy.
summary: Susan invites Bill to buy office supplies which Susan has listed for Susan.