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's so special today ?  
 Person2:Why ?  
 Person1:        Didn't you notice all the roses ?  
 Person2:It's July 7th . Chinese Valentine's Day !  
 Person1:        Oh , God . I just forget it .  
 Person2:I thought you had trouble with Clive !  
 Person1:        No . But now he will be in bigger trouble ! What's a boyfriend for ? Forget about Valentine's Day ?  
 Person2:Poor guy ! It's not fair . You forgot it too .  
 Person1:        Oh , it's Clive .  
 Person2:Wow ! Good timing .  
 Person1:        Excuse me for a while.Clive asked me out to a movie ! Do you want to join us ?  
 Person2:Come on . Two is company .  
 Person1:        So what ?  
 Person2:It's Valentine's Day . Come on . Just go . 

formal