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 . 

informal