[{'role': 'USR', 'utterance': 'Excuse me. Do you think I can get there in time to catch the 11:30 train?'}
 {'role': 'SYS', 'utterance': "Well, let me see. Now it's 11:00 sharp. It's a long way to go. If I take the shortest route, we may come across a traffic jam. If I take a less heavy route, it will save us 10 or more minutes, but you'll have to pay more. Which do you prefer?"}
 {'role': 'USR', 'utterance': 'Are you sure that I can get there in time if we take the less heavy route?'}
 {'role': 'SYS', 'utterance': 'Generally speaking, we can if we go at this speed and nothing unexpected happens.'}
 {'role': 'USR', 'utterance': 'How much more do I have to pay?'}]
{'role': 'SYS', 'utterance': 'Compared to the shortest route, you may pay around 5 Euro more.'}