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:       What are you doing for Christmas this year ?  
 Person2:All my relatives are getting together at my house .  
 Person1:        That's great . M OST of my family is coming home too .  
 Person2:Who can't make it in your family ?  
 Person1:        My sister.She is going to her in-law's house this year .  
 Person2:That's too bad . So , what did you ask for Christmas this year ?  
 Person1:        I asked Santa to bring me a new sweater and some computer games .  
 Person2:I want some computer games also . I gave my parents a really long Christmas list .  
 Person1:        I hope that I get what I asked for .  
 Person2:So what does your family do on Christmas Day ?  
 Person1:        We wake up early and go to church.Then we come back home and open our gifts together . How about you ?  
 Person2:Our family is a little different . We go to church on Christmas Eve instead . 

formal