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:       Hello , Anna speaking !  
 Person2:Hey , Anna , this is Jason .  
 Person1:        Jason , where have you been hiding lately ? You know it's been a long time since your last call . Have you been good ?  
 Person2:Yes . How are you , Anna ?  
 Person1:        I am fine . What have you been doing ?  
 Person2:Working . I've been really busy these days . I got a promotion .  
 Person1:        That's great , congratulations !  
 Person2:Thanks . I am feeling pretty good about myself too . You know , bigger office , a raise and even an assistant .  
 Person1:        That's good . So I guess I'll have to make an appointment to see you .  
 Person2:You are kidding .  
 Person1:        How long have you been working there ?  
 Person2:A bit over two years . This is a fast-moving company , and seniority isn ’ t the only factor in deciding promotions .  
 Person1:        How do you like your new boss ?  
 Person2:She is very nice and open-minded .  
 Person1:        Much better than the last one , huh ?  
 Person2:Yeah . He was a real slave driver . He probably would have loved it if we were robots .  
 Person1:        Forget about him . Come over to my house tonight . Let's get drunk .  
 Person2:Good . Tonight 8 o'clock .  
 Person1:        8 it is . See you then .  
 Person2:Bye . 

informal