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:       Valerie ! Hi ! Wow how have you been ? It ’ s been such a long time !  
 Person2:Darlene ! Indeed , it ’ s been a while ! How have you been ? Wow , you look amazing ! I love what you ’ Ve done with your hair !  
 Person1:        Really ? Thanks ! I went to that hair salon that you told me about , but enough about me ! Look at you ! You haven ’ t aged a day since the last time I saw you ! What is your secret !  
 Person2:Ha ha , come on ! Well , I ’ Ve been watching what I eat , and working out three times a week . By the way , I heard your son recently graduated !  
 Person1:        Yes , my little Paul is finally a doctor . They grow up so fast you know .  
 Person2:He is such a handsome guy . He gets his looks from his mother of course !  
 Person1:        Thank you ! What about your daughter , Pamela ? I heard she has passed the bar exam and married recently .  
 Person2:Oh yes . She had a beautiful wedding in Cozumel Mexico and we all attended .  
 Person1:        Such a lovely girl . I hope my Paul is lucky enough to find a girl like that someday !  
 Person2:But of course ! Well , it ’ s been great talking to you , but I have to get going .  
 Person1:        Same here ! We will catch up soon , maybe over coffee !  
 Person2:That would be great ! Give me a call !  
 Person1:        See you soon ! Bye ! Egg ... I can ’ t stand that woman or her obnoxious daughter . 

informal