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 love your hair that way .  
 Person2:Thanks .  
 Person1:        Where did you have it done ?  
 Person2:My sister did it . When did you get yours cut ?  
 Person1:        Just yesterday . I'm still getting used to it .  
 Person2:Well , it looks very nice .  
 Person1:        Thanks . 

informal