Try this summary of common sense on spark notes it helped me when i had to do similar questions http://www.sparknotes.com/lit/commonsense/summary.html
Thank you sir.
Explanation:
you might be sick or even had worked late and the boss decides to give you a day off. Therefore It is nice to thank him
Answer:
It means they wouldn't beg/request for him to stay with them longer.
I have a question myself what do you want the answer to?
