[{'role': 'USR', 'utterance': 'I want to get on the bus already.'}
 {'role': 'SYS', 'utterance': "It just isn't on time today."}
 {'role': 'USR', 'utterance': 'It was supposed to be here thirty minutes ago.'}
 {'role': 'SYS', 'utterance': "I think it'll be here pretty soon."}
 {'role': 'USR', 'utterance': 'I need to get to work, so it better.'}
 {'role': 'SYS', 'utterance': 'I really do hate public transportation.'}
 {'role': 'USR', 'utterance': "I agree, it's just never on time."}]
{'role': 'SYS', 'utterance': "That's right."}