Given the task definition and input, reply with output. 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'.

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