[{'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: Our Privacy Officer will respond to your complaint within a reasonable time after we receive it, provided you supply return contact details. If you do not provide return contact details, we will be unable to respond to your complaint, although we will consider its content."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_1stParty.'}]