[{'role': 'USR', 'utterance': "Adam, I'm sorry."}
 {'role': 'SYS', 'utterance': 'But, where have you been, Alice? Here over an hour late.'}
 {'role': 'USR', 'utterance': "Yes, but I couldn't help it. I was late getting off work and then I missed the bus. The bus I did catch got caught in a traffic jam. It was one thing after another."}
 {'role': 'SYS', 'utterance': "But, why did you get off work so late? The office closes at 6, doesn't it?"}
 {'role': 'USR', 'utterance': "Yes, but there's a rash on at the moment in my boss asked me to work on some urgent letters."}]
{'role': 'SYS', 'utterance': "But didn't you tell him you had an appointment?"}