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:       Was there an accident on the freeway today ?  
 Person2:You haven't heard about it ?  
 Person1:        No , don't you know what happened ?  
 Person2:This truck flipped over on the 210 .  
 Person1:        Are you serious ?  
 Person2:I'm telling you the truth .  
 Person1:        Did anyone get hurt ?  
 Person2:Two people were injured .  
 Person1:        Are they going to be okay ?  
 Person2:I think so .  
 Person1:        Well , that's a miracle that no one was killed .  
 Person2:Yes , they were lucky . 

informal