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:       Are these your triplets ? They ’ re beautiful ! I ’ Ve seen other babies who were nothing but skin and bones at their age . You know , they ’ re absolutely identical of you and John ! Are you planning on having any more ?  
 Person2:Bite your tongue ! I ’ m already at the end of my rope . Some nights I don ’ t sleep at all . John manages to sleep like a log even when the babies are screaming at the top of their lungs .  
 Person1:        Well , tell me . How was the labor and delivery ?  
 Person2:I wouldn ’ t say that I had the time of my life but at least everything went without a hitch .  
 Person1:        Well , hang in there . In twenty years , you ’ ll fell it was well worth it ! 

informal