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:       You ’ ll never guess what ! My friends Julie and Alex are getting married ! 
 Person2:Wow that ’ s great news ! They ’ re a great couple ! 
 Person1:        I know ! Anyways I just talked to Alex ’ s best man and he is organizing the bachelor party It ’ s gonna be so much fun ! All the groomsmen are thinking up all the wacky and crazy things we are going to do that night . 
 Person2:You aren ’ t going to a strip club , are you ? I don ’ t want you getting a lap dance from some stripper with the excuse that it ’ s your friends party . 
 Person1:        Aw come on ! It ’ s just some innocent fun ! You know how these things are ! We are gonna play drinking games , get him some gag gifts and just have a good time . Nothing too over the top . 
 Person2:Well , I don ’ t know . 
 Person1:        Come on ! If one of your friends was getting married I wouldn ’ t mind you going to her bachelorette party ! 
 Person2:Good , because my friend Wendy is getting married and I ’ m organizing her party ! 
 Person1:        What ! 

informal