[{'role': 'USR', 'utterance': 'Did you know that drinking beer helps you sing better?'}
 {'role': 'SYS', 'utterance': 'Are you sure? How do you know?'}
 {'role': 'USR', 'utterance': "Well, usually people think I'm a terrible singer, but after we all have a few beers, they say I sound a lot better!"}
 {'role': 'SYS', 'utterance': 'Well, I heard that if you drink enough beer, you can speak foreign languages better. . .'}
 {'role': 'USR', 'utterance': "Then after a few beers, you'll be singing in Taiwanese?"}]
{'role': 'SYS', 'utterance': 'Maybe. . .'}