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 want to try something different today .  
 Person2:What do you mean ?  
 Person1:        I want a different hair style .  
 Person2:What style do you want ?  
 Person1:        Can you make my hair short ?  
 Person2:Exactly how short do you want it ?  
 Person1:        Make it a few inches long .  
 Person2:Are you sure you want me to cut it that short ?  
 Person1:        I've been thinking about this for a while now .  
 Person2:Okay . I'll do it if you're positive that this is what you want .  
 Person1:        I honestly want my hair that short .  
 Person2:All right , then let's begin . 

informal