[{'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: Details of Correspondence: If you contact us by email, we may keep a record of that correspondence in our system. To troubleshoot your problem we may need your mobile model name, OS version and our app version number. We will not retain a record of that correspondence for no longer than is reasonably necessary."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_E_Mail_Address_1stParty.'}]