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: Do you know that scientists replicated a sheep into an identical clone .
Person2:I heard about that . It was successful .
Person1: It's a big jump in science . Maybe more like a leap .
Person2:I should say , it stunned me . I can't imagine what they will think of next .
formal