[{'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: Truecaller may from time to time ask you to provide information on your experiences from using the Truecaller Services, which will be used to measure and improve quality. You are at no time under any obligation to provide any of such data. Any and all information which is voluntarily submitted in feedback forms or any surveys that You accept to take part in is used for the purposes of reviewing this feedback and improving the Truecaller software, products and websites."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]