The Postman Stage 2

"The postman goes to a house on Denver Street. He rings the bell twice.
The old man hears the bell but he can`t open the door immediately because he is upstairs...
He opens the upstairs` window and puts his head out and asks loudly:"Who is it? "The postman answers:"Postman."
The old man says to the postman:
"Wait a minute! I`m coming downstairs." "