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 know that ? Dan got a divorce .  
 Person2:Really ? I thought he loved his wife very much .  
 Person1:        Yeah . But his relation with Sallycome to a sticky end and was found by his wife .  
 Person2:He deserved it . 

informal