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 think you should look over these figures again . There are some calculations that are a bit off .  
 Person2:I apologize . This should not have to be this way .  
 Person1:        Apology is accepted . Try to do better next time .  
 Person2:Of course , I should have been more careful . I ’ m sorry . 

informal