chat_history: ['next week my vacation starts. I am really looking forward to it', 'I bet you cant wait.  WHere are going for your vacation?', "i always wanted to visit Miami, i can't wait to visit the beach and take in all  the fun"]
sys_response: Miami sounds like a great place to go for a vacation.   I wish I was going with you!
situation: next week my vacation starts. I am really looking forward to it