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'.

Input: Consider 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 .

Output: informal

Input: Consider Input: Person1: Could you tell me the right time , please ?
Person2:Well , my watch says five past two , but it's no use relying on it , because it has been gaining and losing these last few days .
Person1: You'll have to get it fixed .
Person2:Yes , I will .

Output: formal

Input: Consider Input: Person1: I was wondering how you are going to calculate our final grades .
Person2:Grades are based on many things
Person1: What counts the most ?
Person2:Actually I look at all of it and let's not forget class participation .
Person1: Do you grade on a curve or use percentages ?
Person2:Homework , attendance , and quizzes are sixty percent ; the mid-term and final are worth twenty percent each .
Person1: What if we miss something ?
Person2:I will allow one unexcused absence ; after that you need to contact me ahead of time .
Person1: Will you tell us if we are failing during the year ?
Person2:You will be able to track your progress during the year .
Output: formal