[{'role': 'USR', 'utterance': 'You look tired.'}
 {'role': 'SYS', 'utterance': "Yeah, I've been working so much overtime lately."}
 {'role': 'USR', 'utterance': 'Really? How come?'}
 {'role': 'SYS', 'utterance': 'My boss gave me a big project. I had to have it finished by this morning. It was so difficult.'}
 {'role': 'USR', 'utterance': "You shouldn't work so hard."}]
{'role': 'SYS', 'utterance': 'I know, but hard work pays off. You know.'}