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:       What's up ? You look low . 
 Person2:It's my girlfriend . I guess she's playing the army game . 
 Person1:        How come ? 
 Person2:I saw her dating with her ex-boyfriend again . 
 Person1:        I understand that . But I think maybe it's not a date . You are taking the matter too much to heart . 
 Person2:Maybe . But it still gets on my nerves . 

informal