[{'role': 'USR', 'utterance': 'Excuse me, sir?'}
 {'role': 'SYS', 'utterance': 'Yes?'}
 {'role': 'USR', 'utterance': "I'm afraid you can't smoke here."}
 {'role': 'SYS', 'utterance': 'Why not?'}
 {'role': 'USR', 'utterance': "Can't you see the notes here?"}]
{'role': 'SYS', 'utterance': "I'm sorry. I can't. What does the note say."}