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:       Hi , Larry , how was your weekend ?  
 Person2:Not bad . We had a get-together with friends from college . I haven't seen many of them since graduation . How about you ?  
 Person1:        Great . I hung out with Jo all day shopping , and the went out for dinner together .  
 Person2:Sounds a good weekend . You know it always amazes me that two people as different as you and Jo can become such close friends .  
 Person1:        Yeah , I never thought we could be good friends either . We have our differences . She's more outgoing and active while I am more quiet and reversed , but we still get along extremely well . We can talk for hours about anything .  
 Person2:That's great . I know people who can't stand each other for even five minutes .  
 Person1:        When Jo and I are together , we argue a lot , but that's also part of the fun . Besides , I know she will always be there for me when I need her , and she knows I'll be there for her .  
 Person2:It seems you two bring out the best of one another .  
 Person1:        Exactly . Having Jo as my friend is one of the best things that's ever happened to me .  
 Person2:Yeah , you are so lucky to have found each other .  
 Person1:        Thanks , I think so too . 

informal