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:       I heard you were promoted to general manager of IBM ’ s China Head quarters .  
 Person2:That ’ s true . I got the news yesterday .  
 Person1:        You did a good job for the company . So , this is your first day in the new position . How do you feel ?  
 Person2:Not bad . I ’ m confident . And I like challenges .  
 Person1:        I believe you are cut out for this position .  
 Person2:Thank you . 

informal