[{'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 this Privacy Policy Truecaller may at any time with or without a separate notice change this Privacy Policy, and You are encouraged to review this Policy from time to time. In case of substantial changes, Truecaller notifies the Users by push notice or via notice on the Truecaller website."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]