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:       Has Mien sold his house yet ?  
 Person2:Yes , he has . He sold it last week .  
 Person1:        Has he moved to his new house yet ?  
 Person2:No , not yet . He's still here . He's going to move tomorrow .  
 Person1:        When ? Tomorrow morning ?  
 Person2:No . Tomorrow afternoon . I'll miss him . He has always been a good neighbour .  
 Person1:        He's a very nice person . We will all miss him .  
 Person2:When will the new people move into this house ?  
 Person1:        I think that they will move in the day after tomorrow .  
 Person2:Will you see Mien today , Janey ?  
 Person1:        Yes , I will .  
 Person2:Please give him my regards . Poor Mien ! He didn't want to leave this house .  
 Person1:        No , he didn't want to leave , but his wife did ! 

formal