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 really need to find a bus that goes by PCC . 
 Person2:Where do you need to catch this bus at ? 
 Person1:        All the way up on Las Flores Drive and Fair Oaks . 
 Person2:I can tell you what bus to catch , but you have to walk a little bit . 
 Person1:        Walking isn't a problem for me . 
 Person2:The 267 stops at Altadena Drive and Fair Oaks . 
 Person1:        Which direction do I want ? 
 Person2:Get on the bus heading west . 
 Person1:        Do you know where I get off at ? 
 Person2:Del Mar and Hill . 
 Person1:        Thanks for letting me know , home-girl . 
 Person2:No problem . 

informal