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:       Wow , it has a balcony . 
 Person2:Yeah . Complete with nice of you . 
 Person1:        How many windows are there in the apartment ? 
 Person2:Mm , let me see . I think there are 2 in the bedroom , and 1 each in the living room and kitchen . 
 Person1:        It ’ s just what I want . I think I am ready to sign . 
 Person2:I call the landlord right now . 
 Person1:        Before you send the lease , do you have any questions ? 
 Person2:Yes , does the renting include utilities ? 
 Person1:        It includes everything except cable TV , and telephone . 
 Person2:How much is the cable ? 
 Person1:        It usually comes out about $ 40 a month . 
 Person2:Also , are they allowing the apartment ? 
 Person1:        No , I am afraid the apartment isn ’ t permitted . 
 Person2:I see . Do you love pets ? 
 Person1:        Sorry , that ’ s out of question . I don ’ t have a problem with it . But , unfortunately , the building doesn ’ t allow it . It ’ s a building regulation . 

formal