[{'role': 'USR', 'utterance': 'How do you like these dishes?'}
 {'role': 'SYS', 'utterance': 'Fine, they are colorful and tasty.'}
 {'role': 'USR', 'utterance': 'Did you enjoy your dinner?'}
 {'role': 'SYS', 'utterance': 'Yes, I did. I have never tasted anything like this.'}
 {'role': 'USR', 'utterance': 'Would you like some more rice?'}
 {'role': 'SYS', 'utterance': "No, thanks. I'm full."}
 {'role': 'USR', 'utterance': 'Another piece of meat pie?'}]
{'role': 'SYS', 'utterance': "No, thanks. I'm on diet."}