[{'role': 'USR', 'utterance': 'Do you have any shoes like these?'}
 {'role': 'SYS', 'utterance': 'What size?'}
 {'role': 'USR', 'utterance': 'Size five.'}
 {'role': 'SYS', 'utterance': 'What colour?'}
 {'role': 'USR', 'utterance': 'Black.'}
 {'role': 'SYS', 'utterance': "I'm sorry. We don't haven any."}
 {'role': 'USR', 'utterance': 'But my sister bought this pair last month.'}
 {'role': 'SYS', 'utterance': 'Did she buy them here?'}
 {'role': 'USR', 'utterance': 'No, she bought them in the U. S.'}
 {'role': 'SYS', 'utterance': "We had some shoes like those a month ago, but we don't have any now."}
 {'role': 'USR', 'utterance': 'Can you get a pair for me please?'}
 {'role': 'SYS', 'utterance': "I'm afraid that I can't. They were in fashion last year and the year before last. But they're not in fashion this year. These shoes are in fashion now."}
 {'role': 'USR', 'utterance': 'They look very uncomfortable.'}]
{'role': 'SYS', 'utterance': 'They are very uncomfortable. But women always wear uncomfortable shoes!'}