chat_history: ['We ordered 3 diet cokes with dinner the other night, and they all came out a different shade of coloring!']
sys_response: Wow that is weird.  I love Diet Coke.  What was wrong with it?
situation: At dinner the other night, my family ordered three diet cokes.  They all came out a different shade from dark to light.  I was pretty concerned with the quality of the drinks when they were delivered.