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:       Hi , David ! What are you doing ?  
 Person2:Oh , just looking at these club notices . I'm thinking of joining one . Hey-why don't we join a club together ? How about the Tennis Club ?  
 Person1:        Actually , I'm not good at tennis at all ...  
 Person2:Neither am I . It's just that the best-looking girls are in that club .  
 Person1:        Oh , come on . That's no reason to do something you're not interested in .  
 Person2:Well ... What are you interested in ?  
 Person1:        How about the Classical Music Club ?  
 Person2:Joanna , give me a break .  
 Person1:        Hey-how about the Cinema Club ?  
 Person2:Sounds OK to me . I like movies . Hey , Joanna , look - there are a lot of decent-looking guys here . And the club jackets - they're really hot ! I think we made the right choice ! 

informal