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:       Did you hear who won the English speech contest ?  
 Person2:No , who won ?  
 Person1:        It's George .  
 Person2:Really ? I'm surprised . I didn't know his English was that good . 

informal