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 date is it today ?  
 Person2:why ?  
 Person1:        look at the girls in the street . They all have bunch of flowers.Is it Valentine's Day ?  
 Person2:Oh , yes ! I completely forgot about it .  
 Person1:        did you have a fight with Jack ?  
 Person2:no , but now he'll be in trouble . What's a boyfriend for ? To forget about Valentine's Day ?  
 Person1:        come on , dear ! You forgot it , too .  
 Person2:you know , it's OK for a girl to forget these " big days " , but for a guy , to do that is unforgivable .  
 Person1:        is that your phone ?  
 Person2:oh , it's Jack . Excuse me .  
 Person1:        wow ! good timing .  
 Person2:he asked me out to a dinner tonight . How about joining us ?  
 Person1:        come on ! three's a crowd !  
 Person2:so what ?  
 Person1:        just go ! it's Valentine's Day ! 

formal