How do I get rid of Guzman?

Hint 1 of 13:

Maybe a little fresh air would help you solve this problem.

Hint 2 of 13:

Press the call button and ask Guzman to open the door.

Hint 3 of 13:

On the other hand, maybe the fresh air was a bad idea.  Ask him to close the
door again.

Hint 4 of 13:

Do you see any way of getting rid of him?