chat_history: ['two weeks back i celebrated my birthday and do you know what my office colleagues planed for me', 'Were you suprised that they did this for you?', 'yes and i am quiet happy that they also brought my wife who stays in london for party to surprise me']
sys_response: Wow! How happy you must be. I be that day brought you lost of excitement.
situation: recently my office colleagues had arranged for a surprise birthday party