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:       David , what do you want to do after graduation ?  
 Person2:I suppose I should choose one from the ' Best Career List ' , to be a public officer , what do you think ?  
 Person1:        That sounds like a hot job , right ? But in my opinion , you ought not to choose one career from that so-called list , and you need to take your interests , values , and skills into account .  
 Person2:It beats me ! I never thought about it before and maybe I thought finding a career is a simple thing .  
 Person1:        You'd better ask for suggestions from a career counselor , and then make a decision . 

formal