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:       A friend told me I might find a room here .  
 Person2:Yes . I'll have a room free next week .  
 Person1:        What do you charge ?  
 Person2:12,000 a year , but you can't get visitors to live in .  
 Person1:        OK . Would it be all right to look at the room first ?  
 Person2:Could you come back later ? We're right in the middle of dinner . 

informal