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:       I heard that Kevin got divorced . Is that true ? 
 Person2:Not so bad , but Kevin does have problems with his wife . 
 Person1:        What ? 
 Person2:His wife always complained that Kevin's salary was too low and got no promotion . 
 Person1:        Poor Kevin , we should do something for him . He is a nice guy and does his job well . 
 Person2:Yeah , I agree with you . But you know , it ’ s just one of those things . 

informal