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:       May I help you ?  
 Person2:Yes , I'm looking for a job as a clerk typist in English .  
 Person1:        I'm Mary Kelly . May I ask your name ?  
 Person2:My name is B . How are you , Miss Kelly ?  
 Person1:        I'm glad to meet you , Mr . Zhuang . Sit down , please .  
 Person2:Thank you , Miss Kelly .  
 Person1:        What are your qualifications for being a clerk typist ?  
 Person2:I can type 120 words a minute and I take shorthand at 80 words a minute .  
 Person1:        Would you be willing to take a typing and shorthand test ?  
 Person2:Yes , I would .  
 Person1:        ( After testing ) Your typing and stenography are pretty good . Would you be interested in applying for the job ?  
 Person2:Yes , I'd like to give it a try .  
 Person1:        All right . You need to have an interview with our manager , Mr . McBride . Let's go to his office . 

informal