[{'role': 'USR', 'utterance': 'Do you know how late it is?'}
 {'role': 'SYS', 'utterance': "My fault. I didn't realize what time it was."}
 {'role': 'USR', 'utterance': "I hope you don't think that excuse lets you off the hook."}
 {'role': 'SYS', 'utterance': "Not really. I'm telling the truth."}
 {'role': 'USR', 'utterance': "Haven't I asked you to call if you're going to be home late?"}
 {'role': 'SYS', 'utterance': "This is true, but it must've slipped my mind."}
 {'role': 'USR', 'utterance': 'Regardless, all you had to do was give a call.'}]
{'role': 'SYS', 'utterance': "I know. I should've called."}