[{'role': 'USR', 'utterance': 'Do you know what is the most special event in Kentucky?'}
 {'role': 'SYS', 'utterance': 'The world class horses or the Hollywood stars?'}
 {'role': 'USR', 'utterance': "Well, it's the hats. The hat parade!"}
 {'role': 'SYS', 'utterance': 'Wonderful! Are there many different kinds of hats in the hat parade?'}
 {'role': 'USR', 'utterance': "Yes, it's all about hats. The hats are not only a fashion tradition in the southern part of America, they are also said to be good luck."}]
{'role': 'SYS', 'utterance': 'When does the hat parade take place?'}