[{'role': 'USR', 'utterance': 'Pardon me. Are you familiar with this neighborhood?'}
 {'role': 'SYS', 'utterance': "Well, I should be. I've lived here all my life. What are you looking for?"}
 {'role': 'USR', 'utterance': 'The Post Office.'}
 {'role': 'SYS', 'utterance': 'Well, the nearest one is about a mile away.'}
 {'role': 'USR', 'utterance': 'Oh. Well, I guess I could send a letter.'}
 {'role': 'SYS', 'utterance': "There's a mail box up the street. Have you already got a stamp on that letter?"}
 {'role': 'USR', 'utterance': 'Yes, I have to register it. How do I walk to the post office from here?'}]
{'role': 'SYS', 'utterance': 'Go up this street until you get to the main street. Then turn right and walk about four blocks or so.'}