chat_history: ['Last week, my brother landed a 900 on his skateboard like Tony Hawk at a skating competition.', "Oh wow, that sounds like it might be cool but I don't know what that looks like, what is the 900?", "It's when you turn a skateboard 900 degrees while spinning in the air. It's very hard to do, so you can imagine the look on my face when I saw my brother do it."]
sys_response: Yea, how old is your brother?
situation: My brother landed a 900 on his skateboard like Tony Hawk.