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:       Have you got any hobbies ?  
 Person2:Yes . I'm fond of playing the chess and I'm very keen on playing cards .  
 Person1:        Which is easier to learn ?  
 Person2:Both , but the rules of playing cards vary in different places . 

formal