[{'role': 'USR', 'utterance': 'What about taking a tour around Cambridge today?'}
 {'role': 'SYS', 'utterance': 'I did that with a friend yesterday.'}
 {'role': 'USR', 'utterance': "But didn't you say you would go to the London Eye yesterday?"}
 {'role': 'SYS', 'utterance': 'My friend had already been there, so I changed my plan. Today I want to see some modern art work.'}
 {'role': 'USR', 'utterance': "If so, you can go to Tate Modern. It's a museum with a collection of international artwork from the nineteen hundreds."}]
{'role': 'SYS', 'utterance': 'Do many people visit it?'}