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:       Bang ? ! Bang ! Bang ! What are the Kings doing at seven o ’ clock on Sunday morning ?  
 Person2:Well , Mr . King is singing .  
 Person1:        Yes , but what ’ s the banging noise ?  
 Person2:He ’ s standing on a ladder and banging some nails into the wall with a hammer . Now he ’ s hanging some strong strings on the nails .  
 Person1:        And what ’ s Mrs . King doing ?  
 Person2:She ’ s bringing something pink for Mr . King to drink . Now she ’ s putting it ... OK .  
 Person1:        What ’ s happening ?  
 Person2:The ladder ’ s falling ?  
 Person1:        What ’ s Mr . King doing ?  
 Person2:He ’ s hanging from the string . He ’ s holding onto the string with his fingers and shouting to Mrs . King .  
 Person1:        And is she helping him ?  
 Person2:No , she ’ s running toward our house . That ’ s her ringing the bell .  
 Person1:        Well , I ’ m not going to answer it . I ’ m sleeping . 

informal