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:       Anne , would you please come in for a while ? Please also bring along the minutes of yesterday's management meeting .  
 Person2:Of course , sir ... Here's the minutes of the meeting .  
 Person1:        How long did the meeting last ?  
 Person2:The meeting was delayed by thirty minutes and it lasted for two and a half hours .  
 Person1:        Did the chairman ask for me ?  
 Person2:Yes , I told him that you were very ill and couldn't attend .  
 Person1:        All right . Have you handed in my report to him ?  
 Person2:Yes , I did . Besides , here are all the reports and materials handed out in the meeting . I think you'll have to do some replies .  
 Person1:        Thank you , Anne . You've done an excellent job . Did they mention the date for the next meeting ?  
 Person2:No , they didn't . The chairman said he would send a memo to all managers by the end of this week informing them of the date of the next meeting . 

formal