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 just meant that she's got different taste .  
 Person2:What kind of girl is she ?  
 Person1:        She's pretty conservative .  
 Person2:Is her fiance Taiwanese ?  
 Person1:        Yes .  
 Person2:How old is he ?  
 Person1:        About 30 . He's really outgoing . But why do you ask ? 

formal