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:       Do you often go to watch sports games ?  
 Person2:I go occasionally when there's a game on near home , but usually I watch it on TV .  
 Person1:        Can you recall the games ?  
 Person2:Sometimes . But I'll never forget the game in which our Chinese Women's Volleyball Team won the World Cup . It is the most thrilling and exciting game I have ever seen . 

formal