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:       Are there other chores for us to do ?  
 Person2:We also have to vacuum the house .  
 Person1:        You used to do this by yourself ?  
 Person2:You'd better believe it .  
 Person1:        I'll do the second floor and you do the first floor .  
 Person2:No . You're going to do the entire house .  
 Person1:        What about you ?  
 Person2:I'm going to mow the lawn . 

formal