[{'role': 'USR', 'utterance': "You honestly believe the world's improving every year?"}
 {'role': 'SYS', 'utterance': 'Yes, I do. I think that science is making us wiser. What do you think?'}
 {'role': 'USR', 'utterance': "I don't think you're right there."}
 {'role': 'SYS', 'utterance': 'I believe industry is making us wealthier.'}
 {'role': 'USR', 'utterance': "I don't believe that."}]
{'role': 'SYS', 'utterance': 'And in my opinion, medicine is making us healthier.'}