Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Input:  Person1:       How old is Keith ? 
 Person2:He ’ s 21 . how old is James ? 
 Person1:        He ’ s a year older than Keith , but he looks younger . 
 Person2:How ’ s your father ? 
 Person1:        He ’ s fine . He retired last week . It ’ s turning going in his life . Now he can relax and enjoy his retirement . 
 Person2:He can spend more time with his grandchildren . 
 Person1:        Oh , I don ’ t think he wants to . He wants to travel to several different countries around the world . 
 Person2:So , he wants to have a more active retirement . Good idea ! 
 Person1:        How do you want to spend your old age ? 
 Person2:In the same way , probably . 

informal