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 am confused . How could a golfer need so many clubs ? Seems to me , 14 altogether , right  
 Person2:I should say , a a ' set ' of golf clubs is restricted to no more than 14 clubs .  
 Person1:        Then what makes a ' set ' of clubs ?  
 Person2:In general , a set of golf clubs 3 , 4 , 5 , 6 , 7 , 8 , 9 , PW ; Woods : 1 , 3 , 5 and a putter .  
 Person1:        So many ?  
 Person2:This is not to say you have to carry all of these clubs . It depends on your preferences .  
 Person1:        Have you heard of Tiger Woods ?  
 Person2:Of course even people who don't know anything about golf know his name . 

formal