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:       What is the movie you saw last night ?  
 Person2:It is a new film , ' Transformer ' .  
 Person1:        How do you like it ?  
 Person2:I expected too high from that movie , but I was a bit disappointed about it .  
 Person1:        But I heard the box office rose up to 15 million in the first week .  
 Person2:Box office can't explain everything . I do not think it is cheerful or well-made . The plot is old and the female character is not pretty .  
 Person1:        My sister has given me two tickets for tonight . It is called ' The life of Rose ' , a French movie .  
 Person2:What's it about ?  
 Person1:        It tells the lifetime of a lady singer from a beggar in the street to a famous singer in the world . It is a kind of tragedy .  
 Person2:I prefer the tragedy . It is moving and makes me ponder about my life .  
 Person1:        Let's go . The time is coming .  
 Person2:We can buy the popcorn before entering the cinema . 

informal