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:       Listen , Karen , I need your help . I don't know anyone here yet . 
 Person2:I'm glad to help you . What's wrong ? 
 Person1:        My mother-in-law just went into the hospital in L.A.Hank and I will be flying there tonight . 
 Person2:I'm sorry to hear it . What's wrong with her ? 
 Person1:        Doctors aren't sure yet.But the real problem is Suzy . She has a bad cold , and we don't want to take her with us . But we don't know who can stay with her . 
 Person2:You need a babysitter . 
 Person1:        Yes , I'd ask Jill , the girl I've had before , but I need someone overnight.Maybe even for two nights . 
 Person2:I could have Suzy stay at my place . 
 Person1:        I don't want to do that to you , Karen . 
 Person2:Why not ? 
 Person1:        Your own kids would get Suzy's cold . I think it would be better to have a good babysitter here . But I don't know who to ask . I need someone more mature than Jill . It might even be for two or three days . 
 Person2:I know who we can ask . There is a girl I know , Sara Ralston.She is 17 , and she will usually take this kind of job . I know her from my church , and I trust her completely . 
 Person1:        I'd like to talk with her.This is short notice , I know . But Hank and I are leaving tonight . 
 Person2:I'll get you her number . I hope she can do it . She is very responsible . 
 Person1:        I'm glad you know someone . I knew you would be the best person to ask about this . I don't want to insult Jill or her mother . I think Jill maybe could do it.But I'd rather have someone a little older . 
 Person2:I'll go home and get Sara's number . I'll call her first myself . 
 Person1:        Great . Then call me and let me know if she's free . 

informal