[{'role': 'user', 'content': "Analyze the following clause from a privacy policy and determine if it's fair or unfair. Also identify any privacy practices mentioned: Changes to Information You may review and change PII that you provide to us through the Wi-Fi Service by returning to the pages where you entered it, and reviewing or changing the information directly. You may also request changes to your payment information if you are a pay per use customer of the Wi-Fi Service, by calling Comcast at 1-800-XFINITY, where you will be required to verify your identity."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]