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:       Why did your parents make you stay at home ?  
 Person2:They wanted to go out , and so they made me look after my baby brother .  
 Person1:        Didn't you mind doing it ?  
 Person2:No , I didn't . My brother was very good and I did quite a lot of homework .  
 Person1:        Didn't you even want to go to the cinema ?  
 Person2:Not really . I watched television for an hour .  
 Person1:        What was on television last night ?  
 Person2:Boxing . It was excellent .  
 Person1:        Oh . I enjoy watching boxing on television , too.What a pity I missed it last night !  
 Person2:What did you do last night ?  
 Person1:        I went to a boxing match in the sports stadium . 

informal