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 , Ellen .  
 Person2:Hello , Helen , have you heard the news ? There ’ s been a horrible accident .  
 Person1:        Oh , no ! What happened ?  
 Person2:Hilda Harris husband , Henry had an accident on his way home from work .  
 Person1:        How awful ! Was he hurt ?  
 Person2:Yes . He was taken to the hospital in an ambulance .  
 Person1:        How did it happen ?  
 Person2:His car was hit by an express train . It happened at the crossing just behind his house .  
 Person1:        How horrible !  
 Person2:He ’ s having an operation in the hospital now . Poor Hilda ! You can imagine how unhappy she is .  
 Person1:        I hope he ’ ll be all right .  
 Person2:I hope so , too . 

informal