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:       What games do you like ? 
 Person2:I like word games . 
 Person1:        How about a game of bridge ? 
 Person2:I don't like it at all . 
 Person1:        What about guessing games ? 
 Person2:I'm not one for the games . 
 Person1:        Let's play other game . 
 Person2:What about playing go ? 
 Person1:        OK . 

formal