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:       Hello everyone , and welcome to our CPR for beginners course.First of all , does anyone know what CPR stands for ?  
 Person2:Cardiopulmonary resuscitation !  
 Person1:        That ’ s right ! We apply CPR in the case of cardiac arrest or pulmonary arrest .  
 Person2:What does that mean ?  
 Person1:        Well , basically if your heart stops pumping blood , or your lungs stop pumping air , then we need to get them going again ! That ’ s when we have to apply this procedure . Let ’ s begin ! I need a volunteer .  
 Person2:Me ! Me !  
 Person1:        Alright , come here and lay flat on your back . Let ’ s suppose this young woman has stopped breathing . We must lift the person ’ s chin so that we clear a pathway for air to get into the lungs . Then we place our mouth over the other person ’ s mouth and blow air two or three times , like this .  
 Person2:Wait , what are you doing ? I ’ m a married woman ! You can ’ t just try to kiss me like this !  
 Person1:        Madam I ’ m not trying to kiss you ! I am trying to demonstrate how to apply CPR in the case of an emergency .  
 Person2:Well , OK . But no French kissing !  
 Person1:        As I was saying , we blow air through the mouth in this manner . Once this is done , we must try to get the heart going again . To do this , we place our hands over the person ’ s chest , and press down firmly two or three times .  
 Person2:Wait , what are you doing ! You can ’ t just kiss me then go for second base ! 

informal