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:       Today more and more people advocate lifelong learning . But people have different views about lifelong learning . How do you understand lifelong learning ?  
 Person2:I think lifelong learning is the concept that it's never too soon or too late for learning  
 Person1:        Does that mean studying all the time ?  
 Person2:I don't think so . I think it's about your attitude towards learning . One should be open to new ideas , decisions , skills or behaviors .  
 Person1:        Then the axiom - ' You can't teach an old dog new tricks ' doesn't work any longer .  
 Person2:You're right . Lifelong learning is about finding learning opportunities at all ages and in numerous contexts  
 Person1:        Yes , I agree with you . When I retired I will participate in programs to keep momentally active .  
 Person2:Me too . To keep up with the changing world , one must be involved in lifelong learning and be ready to accept new things .  
 Person1:        You know what ? I've recently been teaching myself French .  
 Person2:Really ? That's great ! I know that your company has a lot of clients in France .  
 Person1:        Yes , so I want to learn French to develop my career . 

informal