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:       Mom , are those tattoos on your brows ?  
 Person2:Uh , yes , they are .  
 Person1:        Moooooommmmm ! You're so in ! Anything else you've been keeping from me ?  
 Person2:What ?  
 Person1:        Any body piercing ? Stick out your tongue !  
 Person2:Oh , for Pete's sake . This is cosmetic . My brows are falling out . I did this for convenience .  
 Person1:        Come on mom . I'm your A ! Wait till the guys hear about this !  
 Person2:Mike , don't even think about it ! 

informal