You will be given a definition of a task first, then some input of the task.
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: What do you make of the case ?
Person2:If you ask me , I don ' t think it ' s guilty .
Person1: What do you mean by saying so ?
Person2:I mean it ' s not his fault .
Person1: Oh , yeah ?
Person2:Yes . Don ' t you think he should be pitied rather than accused ?
Output:
formal