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:       Miss Wang , how do you do ? I ’ m Allan James , the director of human recourse department of this company .  
 Person2:How do you do , Mr . James ? Thank you for asking me to come in .  
 Person1:        Not at all . Please sit down , then we can begin .  
 Person2:Thank you .  
 Person1:        As you know , Miss Wang , we are looking for an executive secretary with business background and good English skills . We looked into your resume and thought you might be a good candidate .  
 Person2:Thank you .  
 Person1:        Today ’ s interview is for us to get to know a little about you . And the interview will last a little bit longer . So , if you ’ re comfortable , I want to ask you some questions . 

informal