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:       Where are you going ?  
 Person2:I ’ m going to the hospital .  
 Person1:        What ’ s the matter ?  
 Person2:Professor Wang was hurt in a traffic accident .  
 Person1:        That ’ s too bad . How are things now ?  
 Person2:His life is hanging by a thread , and he is under an emergency treatment . 

formal