Why was Sally unhappy?

M: Well, Sally. Why do you look unhappy?
W: Oh,Hill, 1 have just had a quarrel with Mr. Smith.
M: What on earth was it about?
W: Well, I have made three bad mistakes so far this week, so he got very angry with me.
M: But I don’ t understand. You are usually very careful and never make mistakes.
W: I’ m just so tired. I don’ t know what I’ m doing.
M: Why? Have you been going to bed late these days?
W: No,I’m usually in bed at about eleven. But I’ ve been woken up at about hair post four every morning. And than I cannot go beck to sleep again.
M: Why?
W: It’s my new neighbor, the milkman next door. He gets up at half past four and he always turns the radio on loudly. And it’ s difficult to ask him to mm it down. 1 don’ t know him yet.
M: If you don’ t want to see him, write Mm a letter. 1’11 help you write the letter.
W: OK. Let’s try.