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:       You look really wiped out ? 
 Person2:I had meetings back to back all morning . And phone rang off the hook from the minute I walked into the office . 
 Person1:        Not a good day . I hate to tell you that Mr . Thomas wants to see the profit ’ s statement for new project tomorrow morning . 
 Person2:I can ’ t believe it . I guess I ’ ll be here until 10 again tonight . 

informal