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:       Merry Christmas ! 
 Person2:Huh ? 
 Person1:        I said Merry Christmas ! Don ’ t you know that Christmas is almost here ? 
 Person2:It is ? Oh , that ’ s nice . 
 Person1:        Huh ? Didn ’ t you know ? Aren ’ t you excited ? 
 Person2:Actually , I ’ d forgotten about it . 
 Person1:        Forgotten about it ? How could you ? 
 Person2:Because I ’ m not Christian , I ’ m Jewish . 
 Person1:        Oh , I ’ m sorry . I didn ’ t know . 
 Person2:It ’ s all right . There are so many Christians in America that everybody takes it for granted that I ’ m Christian . 
 Person1:        I guess so . So what do you do around this time of year ? 
 Person2:Well , I ’ ll celebrate Hanukah soon , but that ’ s not as important to us as Christmas is to you . Mainly I ’ ll just enjoy the holiday break . 
 Person1:        Well , would you be horribly offended if I invited you to a Christmas party at my house ? 
 Person2:Not at all . A party is a party . I ’ ll be happy to come . 

informal