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:       That one looks pretty big . Are you going to keep it ?  
 Person2:Of course . I always keep what I catch .  
 Person1:        Not me . I like to throw back what I catch .  
 Person2:If it's within the legal limit , I prefer to keep it . 

formal