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 are studying here , aren ’ t you ? 
 Person2:Yes . I have been here for three years . 
 Person1:        Do you like this campus ? 
 Person2:Well . I ’ m rather disappointed with it . 
 Person1:        How come ? 
 Person2:It ’ s too old . And it isn ’ t as specious as I expected . 
 Person1:        Oh . It ’ s awful , but it can ’ t be helped . 
 Person2:I ’ ll just have to put up with it . 

formal