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 watch the Oscars on Sunday night ?  
 Person2:No , but I heard about that Angelina Jolie and Brad Pitt didn't attend .  
 Person1:        Yes , that was surprising . I heard that they got into a fight and then decided not to go .  
 Person2:They must be the most famous celebrity couple in Hollywood .  
 Person1:        They're also one of the richest couples . They have so much money and they can buy almost anything they want .  
 Person2:I also heard that Tom Cruise and Katie Holmes made an appearance at the Oscars .  
 Person1:        Did either one of them win an Oscar this year ?  
 Person2:I think Tom might have been nominated for one of his films , but I don't think he won anything .  
 Person1:        Tom Cruise may be handsome , but I think he's a bit crazy , don't you ?  
 Person2:Yes , his marriage to Katie is actually quite scandalous .  
 Person1:        I still think that they only got married to get more publicity for their movies and themselves .  
 Person2:People in show biz can have such an easy life ; I don't know why they have to make it so complicated .  
 Person1:        I would never want to be a celebrity because the paparazzi would also be after you .  
 Person2:That's true . I guess it would be difficult to have people taking pictures of you everywhere you go .  
 Person1:        Thank goodness we're not rich and famous !  
 Person2:Being famous , I can do without , but I wouldn't mind being rich . 

informal