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:       Have you seen this ?  
 Person2:What ?  
 Person1:        They killed another hostage .  
 Person2:Oh , how awful . What a terrible thing to do .  
 Person1:        I agree completely . I just don't understand what's wrong with them . Don't they have any humanity ?  
 Person2:Well , maybe they've got a point . I mean , I suspect that they think the same about us .  
 Person1:        Yes , but that doesn't make them right , does it ? Just because they think so ?  
 Person2:I guess not . My view is that we should give in to their demands , so that innocent people can stop getting killed .  
 Person1:        Come on , you can't be serious ! We should never give in to terrorist's demands , otherwise where would we be ?  
 Person2:Well , that's probably true , but I don't think we should be dogmatic about it . A colleague of mine was kidnapped once , so perhaps I have a different view of things .  
 Person1:        Really ? What happened ?  
 Person2:Well , it was in the Balkans during the war . He was only held for three days , and then they simply released him . It was a case of mistaken identity , and they just let him go when they found out he was no use to them . It was lucky they didn't kill him .  
 Person1:        Oh , sure . 

informal