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:       Did you hear about car accident on Spring Road yesterday ?  
 Person2:Yes , I did . I heard that they took both drivers to hospital . One needed surgery .  
 Person1:        Yes . I heard he had a few broken bones too , but that the doctors have set the fractures without any problems .  
 Person2:The second driver was luckier . He had a concussion and needed some stitches for his head wound .  
 Person1:        Yes . He was released from hospital yesterday evening . The other man could be there for weeks .  
 Person2:I understand that he ’ s connected to a heart monitor and breathing apparatus . His condition can ’ t be very good .  
 Person1:        The hospital announced this morning that his condition is poor but stable . What does that mean ?  
 Person2:It means he ’ s really badly injured , but he will almost certainly survive .  
 Person1:        His family will be pleased to hear that . They must have been so worried . 

formal