Yesterday I finally received a notification email regarding my application. It was still better to get an answer rather than hanging around nowhere. Even though it was not a good news, I felt relieved because I could go for another chance.
Based on this, I would like to share how to politely answer the email in term of rejection. You could modify and make it better than mine, of course. This is just my opinion. Hope this will be useful. To me: Cheer up! There is a better way out there waiting for me.