[{'role': 'USR', 'utterance': 'I think I may rent this apartment from you.'}
 {'role': 'SYS', 'utterance': "That's great to hear."}
 {'role': 'USR', 'utterance': 'How much are you looking to rent it for?'}
 {'role': 'SYS', 'utterance': 'For each month you would have to pay $ 1050.'}
 {'role': 'USR', 'utterance': 'That is too expensive.'}
 {'role': 'SYS', 'utterance': "I don't think that is too much for rent."}
 {'role': 'USR', 'utterance': 'How does $ 850 a month sound to you?'}]
{'role': 'SYS', 'utterance': "That's not enough."}