[{'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: 5. Changes to Policy From time to time, we may revise this Policy. We reserve the right to update or modify this Policy, or any other of our policies or practices, at any time with or without notice. However, we will not use your Personal Information in a way that is materially different than the uses described in this Policy without giving you an opportunity to opt-out of such differing uses. We will post the revised Policy on the Site and the App, so that users can always be aware of what information we collect, how the information is used and under what circumstances such information may be disclosed. You agree to review the Policy periodically so that you are aware of any modifications. Your continued use of the Site or the App indicates your assent to any changes and signifies your agreement to the terms of our Policy. If you do not agree with these terms, you should not use the Site or the App."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]