[{'role': 'USR', 'utterance': 'May I take your order?'}
 {'role': 'SYS', 'utterance': "What's the specialty of the house?"}
 {'role': 'USR', 'utterance': 'The baked fish in tomato sauce is pretty good.'}
 {'role': 'SYS', 'utterance': 'I like fish. Please bring me an order of that.'}
 {'role': 'USR', 'utterance': 'Do you want some dessert?'}]
{'role': 'SYS', 'utterance': 'Apple pie, please.'}