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 television last night , Charles ?  
 Person2:Yes , I did .  
 Person1:        It was a good game , wasn't it ?  
 Person2:Oh , I didn't watch the football match . I wanted to but my wife preferred to see the old film .  
 Person1:        What a pity . It was quite exciting . Both teams played very well .  
 Person2:How did it finish ?  
 Person1:        It finished in a draw . What was the film like ?  
 Person2:It was quite good . But . I missed the beginning of it because I had to eat first .  
 Person1:        Did your wife enjoy it ?  
 Person2:No , she didn't . After half an hour she stopped watching and started to read a book . 

formal