Q: 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'.
Person1: Susan has got married .
Person2:Really ? How do you know that ?
Person1: Her marriage was a hole and corner affair .
Person2:Why ? That ' s good news , but no one knows it ?
Person1: I have no idea . Maybe she didn ' t want to let us ... , so ...
A:
informal