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 ? 
 Person2:What happened with that guy at the cafe ? 
 Person1:        nothing 
 Person2:But you ’ re crazy about him ? 
 Person1:        Yes , I am . 
 Person2:Why don ’ t you run off with him ? What are you waiting for ? 
 Person1:        I don ’ t actually know him . 
 Person2:Really ? 
 Person1:        I only know him through the ... you are not gonna believe this . 
 Person2:Oh , let me guess . Through the internet ? 
 Person1:        Yes . 
 Person2:Hmm . You ’ Ve got mail . 

informal