chat_history: ['You know, that is tough, but it happens to the best of us. What went wrong?', 'Nothing went wrong, we just have different lives in different places. I go visit every now and then.', 'But you failed the exam? Did you revise?']
sys_response: I did not revise. Sometimes exams are failed and things are not corrected.
situation: I tried my best for an exam, I still failed!