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:       Hello , this is Lin Tao . I am calling to inquire about my interview result last week . 
 Person2:Hi , I am sorry to say that your experience doesn't fit the job at all . 
 Person1:        Sorry to hear that , but could you inform me why I failed ? 
 Person2:I have to say your education and experience are very outstanding , but it seems that you are not good at working in a team which we attach great importance to . 

formal