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:       Did you play football yesterday ?  
 Person2:Yes , I played with Tony and John .  
 Person1:        What did you do after you'd played football ?  
 Person2:We all went swimming .  
 Person1:        Are you going swimming again this afternoon ?  
 Person2:No , we aren't . We're going to help Mr Smith to plant some flowers .  
 Person1:        Are you helping him all afternoon ?  
 Person2:Yes , we are . We can neither play football nor do our homework today .  
 Person1:        You're , going to be very busy .  
 Person2:Yes , we certainly are . But Mr Smith is going to pay us for all the work we'll do . 

formal