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 must apologize for having delayed the work . 
 Person2:No , that ’ s not all your fault . 
 Person1:        But you will miss your good chance . I ’ m So sorry 
 Person2:There ’ s no need to apologize.Forget about it . 

informal