[{'role': 'USR', 'utterance': 'Hi, Bill. Can you tell me how it happened?'}
 {'role': 'SYS', 'utterance': "Sure. I was climbing the mountain in Nuremberg. Suddenly, the weather became really bad. There was lots of snow and we couldn't see anything. We got lossed. Well, we spent 4 days on the mountain. The temperature was 20 degrees below 0. We didn't have any equipment or food."}
 {'role': 'USR', 'utterance': 'So what happened? I guess somebody found you, right?'}
 {'role': 'SYS', 'utterance': "Yes. But we were very sick. I couldn't move my legs because of the cold. I spent 2 months in the hospital. The doctors removed my legs."}
 {'role': 'USR', 'utterance': 'Right, so you lost your legs, but you want to try your best to stay active.'}]
{'role': 'SYS', 'utterance': "That's right. In fact, I decided to make some new legs for myself. I realized that no one has to be physically disabled. We can use modern technology to help."}