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:       I heard Tom was caught stealing something again in the supermarket .  
 Person2:Really ? He deserves it ! They should teach him a good lesson .  
 Person1:        But the word is his brother would go bail for him . Last time it ’ s his father who went bail for him .  
 Person2:Then he is really lucky . 

informal