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:       I have an idea for Christmas this year . 
 Person2:What is it ? 
 Person1:        Let's not exchange any gifts at all . 
 Person2:You big scrooge ! 
 Person1:        Hear me out . We can pool the money and give it to a family who could really use it ! 
 Person2:But you may have some trouble convincing the kids . 
 Person1:        Actual 1y , it was their idea first . 
 Person2:Now we know that they realize the real meaning of Christmas . 

informal