[{'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: Cookies help establish a user session and allow our server to provide site users with the appropriate information, advertisements and services. We also use cookies to ensure you obtain the information you request, to authenticate your authority to access the site and to track the usage of our websites in order to improve the site(s) according to our customers' needs. If you are a registered user on our site and you elect to have the site store your MileagePlus number, the cookie stored on your computer will contain your MileagePlus number."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Cookie_or_similar_Tech_1stParty.'}]