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:       Let ’ s move out of here . This apartment is too small .  
 Person2:I agree . I ’ ll look in the paper .  
 Person1:        A house would be great . I could plant a garden . And you could use the garage for a workshop .  
 Person2:Here ’ s an interesting ad  
 Person1:        How much is the rent ?  
 Person2:The ad says $ 325 plus deposit .  
 Person1:        When is the place available ?  
 Person2:It ’ s available now , and it ’ s got a very good location . You won ’ t be far from work . 

formal