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'.

Ex Input:
Person1: Have you ever seen coco ?
Person2:I've seen her on TV but not in the flesh .
Person1: I'm so familiar with her songs , but I don't know what kind of person she is in real life .

Ex Output:
formal

Ex Input:
Person1: He got the scholarship to Harvard .
Person2:You're kidding !
Person1: It's true . He is a hard worker .
Person2:I know he really deserves this .

Ex Output:
informal

Ex Input:
Person1: Who finances the magazine ?
Person2:I don't know exactly . I only hear it's financed by a famous film star .
Person1: Does it have a large circulation ?
Person2:Yes , so it really doesn't matter who offers the money.The paper itself is profitable .

Ex Output:
formal