[{'role': 'USR', 'utterance': 'Has Alan shown up yet?'}
 {'role': 'SYS', 'utterance': 'Nope. I guess something might have come up.'}
 {'role': 'USR', 'utterance': 'I wonder what happened.'}
 {'role': 'SYS', 'utterance': "I don't know. I hope it's nothing serious."}
 {'role': 'USR', 'utterance': 'Last week his sister was admitted to the hospital.'}
 {'role': 'SYS', 'utterance': 'Oh? What happened?'}
 {'role': 'USR', 'utterance': 'His sister had a car accident last week.'}]
{'role': 'SYS', 'utterance': 'Is she fine now?'}