[{'role': 'USR', 'utterance': 'Shall we share a taxi?'}
 {'role': 'SYS', 'utterance': 'Where are you heading now?'}
 {'role': 'USR', 'utterance': 'I want to go back to my college on the Huanghe road. It is very close to your house.'}
 {'role': 'SYS', 'utterance': "Is that the university next to the Teachers' College?"}
 {'role': 'USR', 'utterance': "That's the one."}]
{'role': 'SYS', 'utterance': "You mean we'll share the taxi?"}