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'.

Example Input: 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 .
Example Output: informal

Example Input: Person1: Look , my clothes are wet .
Person2:Mine are wet , too .
Person1: Unexpectedly , a girl threw a bucket of water on me .
Person2:She wished good luck to you .
Person1: The Dai people are enthusiastic .
Person2:Yes .
Example Output: informal

Example Input: Person1: I'm quite upset ! I want a new room and a refund for tonight .
Person2:Forgive me , sir , I haven't been told what the problem is .
Person1: I'm about to be swept away by millions of cockroaches !
Person2:My apologies , sir . We'll transfer you to a new room at once and give you a full refund .
Person1: Thank you . I didn't want to have to take this to court .
Person2:Sir , we never want a guest to stay here mad or unhappy .
Example Output:
informal