answer: #Person1# brings up the resignation to #Person2# because #Person1# has decided to study abroad.
documents: #Person1#: Excuse me, sir. I've made a tough decision and here is my resignation.
  #Person2#: I am sorry to hear that. Why do you want to quit?
  #Person1#: I'm sorry to bring up my resignation at this moment, but I've decided to study abroad.
  #Person2#: All right. Welcome back anytime.
  #Person1#: Thank you, sir. I'd like to say that I'Ve really enjoyed working with you. However, I think it's about time for me to leave.
  #Person2#: I am glad to work with you, too. Good luck!
  #Person1#: Thank you.