[{'role': 'USR', 'utterance': 'How do you use an ATM card, billy?'}
 {'role': 'SYS', 'utterance': "It's easy grandpa. Insert you card into the machine here. Then wait a moment. Ok. Now you enter your PIN. It should have four numbers."}
 {'role': 'USR', 'utterance': "Oh yes. I've got it written down here. Just a minute."}
 {'role': 'SYS', 'utterance': "You really shouldn't write it down. You should memorize it. You can change it to a more convenient number if you like."}
 {'role': 'USR', 'utterance': "Ok, I've entered my PIN. There are several options on the screen. I guess I just choose which service I want, don't I?"}]
{'role': 'SYS', 'utterance': 'Yes. Choose the service you need to use. If you choose to withdraw money, the machine will ask you how much you want.'}