Excuse me , sir . I've made a tough decision and here is my resignation .   I am sorry to hear that . Why do you want to quit ?   I'm sorry to bring up my resignation at this moment , but I've decided to study abroad .   All right . Welcome back anytime .   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 .   I am glad to work with you , too . Good luck !   Thank you . 