[{'role': 'USR', 'utterance': 'Hi, David. How was your day?'}
 {'role': 'SYS', 'utterance': "Don't ask, it was terrible."}
 {'role': 'USR', 'utterance': 'You poor thing. What on earth happened?'}
 {'role': 'SYS', 'utterance': "Well, at about 11 o'clock this morning, I was skateboarding in the park."}
 {'role': 'USR', 'utterance': 'Oh, yes? Did you see Tony there?'}
 {'role': 'SYS', 'utterance': "No. Luckily, I didn't see anyone I know."}
 {'role': 'USR', 'utterance': "What do you mean 'luckily'?"}]
{'role': 'SYS', 'utterance': "To start with, I wasn't looking where I was going and I fell off my skateboard. I landed in a pool. I was really dirty."}