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:       Is everything ready for the Christmas party ?  
 Person2:Almost . I ’ Ve put up the decorations , and we ’ Ve decorated the Christmas tree with plenty of tinsel and baubles .  
 Person1:        I like the big star on the top of the tree . I ’ ll put the presents under the tree later , how ’ s the food .  
 Person2:I ’ Ve prepared most of it already and we ’ Ve got plenty of snack foods-you know , crisps , biscuits , and things . Are you going to make the punch ?  
 Person1:        Yes . I ’ Ve bought all the things to go in it . It won ’ t take long to make . How many people are coming to the party ?  
 Person2:I think everyone will be coming . Dave don ’ t come because he has to go to his parent ’ s home and they live in Scotland .  
 Person1:        Do we have Christmas pudding ?  
 Person2:Yes , we do . I hope we have enough for everyone . Did you send out all your Christmas cards in time ?  
 Person1:        Yes , I did . I send most of them a week ago . I ’ Ve brought some with me to the party to give to people in person .  
 Person2:I did the same . I spent hours yesterday evening wrapping presents . I hope I didn ’ t forget to buy anyone something !  
 Person1:        I hope you didn ’ t forget mine ! 

formal