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:       That's unfair , Mom .  
 Person2:What's up ? Honey !  
 Person1:        Dad is bigger than you , but how come I'm smaller than May .  
 Person2:Honey , it doesn't matter . The key to play volleyball is to cooperate with each other .  
 Person1:        What should I do ?  
 Person2:You go figure it out yourself .  
 Person1:        Got it , Mom .  
 Person2:OK , Ben and May , here we go . Be careful , Danny , the ball is coming . That is the green one .  
 Person1:        Mom , don't worry about me , I can do it .  
 Person2:Danny , back to your position . Move !  
 Person1:        OK . Bingo ! We win . Give me five , Mom . 

informal