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:       Ah , ah , ah ...  
 Person2:All right , Bill.Here ' s your daily exercise schedule . You are to jog before breakfast .  
 Person1:        Jog ?  
 Person2:Then , you are to walk to work .  
 Person1:        Walk ?  
 Person2:Thirty minutes in gym at lunch time .  
 Person1:        Oh no .  
 Person2:Use the stairs , never the elevator .  
 Person1:        Oh , dear .  
 Person2:And three times a week , you can either swim , play racketball , or hand ball .  
 Person1:        Oh no .  
 Person2:OK , you can stop now.It ' s time for the dance class .  
 Person1:        Dance class ! I don't know how .  
 Person2:You will .  
 Person1:        Oh ... 

informal