Excuse me. Are you in charge here?
Yes, sort of.
Then perhaps you can help me. I need to use a computer to type an assignment.
Well, are you a student?
Yes, I am. First year.
Ok. Have you used a computer before?
Yes, I've done a bit of word processing.
That's good. You can use a computer for 2 hours at a time.
Mm. What can I do if something goes wrong with the computer?
There's usually someone here from 9 o'clock. You can ask him for help.