[{'role': 'USR', 'utterance': 'How much will our order from your factory be?'}
 {'role': 'SYS', 'utterance': "I'll be happy to get back to you with an estimate in the next few days."}
 {'role': 'USR', 'utterance': "I'm afraid I can't wait that long. Can your office at least provide me with a ballpark figure?"}
 {'role': 'SYS', 'utterance': 'Well, I would need an idea of how large your order would be. About how many units would you need?'}
 {'role': 'USR', 'utterance': 'Just give me an estimated figure for an order of 100 units.'}]
{'role': 'SYS', 'utterance': 'Please give me a few minute to calculate. . . Our asking price should be about $ 100 per unit with an order of 100. Is that price acceptable to you?'}