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: Have you run into your cousin Jimmy lately ?
Person2:As a matter of fact , I have . I ran into him just the other day .
Person1: How's he doing ?
Person2:Not too well . He had to have four teeth pulled last week .
Person1: He did ? That's too bad !
Person2:I think so , too .
Person1: Next time you see him , please tell him I'm thinking of him .
Person2:I'll be sure to do that .
informal