[{'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: In most cases and subject to legal and contractual restrictions, You are free to refuse or withdraw Your consent at any time upon reasonable, advance notice. It should be noted that in certain circumstances, the Service can only be offered if you provide Us with Your personal information. Consequently, if You choose not provide Us with the required personal information, we may not be able to offer You the Service."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]