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:       Hey , Tom , I want to learn how to play golf .  
 Person2:You're really sporty !  
 Person1:        I want to do everything I can .  
 Person2:Do you have clubs ?  
 Person1:        No . Can I rent clubs ?  
 Person2:There are clubs for beginners . It's cheaper to buy those rather than rent them a few times .  
 Person1:        What kinds of clubs ?  
 Person2:Like the seven-piece set . It's only $ 120 .  
 Person1:        I'll buy a set . But you have to teach me .  
 Person2:Okay . 

informal