chat_history: ['I packed a sandwich before I went to work', 'Are you trying to save money by not eating out at work?', 'Yup, and I am too lazy to drive out to a restaurant!']
sys_response: Well, it can save you a bunch of money!  Plus you gain the time that you would normally spend going out somewhere and you can use that time to have more of a break.
situation: I packed a sandwich before I went to work