What can we learn from this conversation?

W: Excuse me, do you know how it works?
M: Yes. Put the washing inside, shut the door, the money goes here. Then when the machine starts, you have to put the soap powder in through here.
W: Is that all?
M: Yes.
W: But is there anything I should do when it works?
M: You don’t have to do anything else until the machine stops.
W: Thank you very much.