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:       Hi , Jone , how are you ?  
 Person2:Terrible .  
 Person1:        What's wrong ?  
 Person2:Someone robbed my apartment last week . The robber took $ 550 .  
 Person1:        Oh , no ! Did you call the police ?  
 Person2:No .  
 Person1:        Why not ?  
 Person2:My English isn't very good . I didn't know what to say to them .  
 Person1:        I'm going to give you some advice , Jone.If this happens again , you should call the police immediately . You should try to remember everything . You should explain everything to the police . 

informal