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:       Many congratulations on your winning the game .  
 Person2:That ’ s very kind of you , but it ’ s nothing special .  
 Person1:        You were doing great out there !  
 Person2:Well , actually it ’ s just about luck . 

informal