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: Who's that ?
Person2:Saint Jude-he's the saint of lost causes . Like my cousin , Anna , who can't stop getting pregnant . She's a lost cause .
Person1: Is that your cousin in the back ?
Person2:Yep . She's always got a bun in the oven . She was pregnant before marriage-a real sin in the Catholic Church .
Person1: What about birth control pills ? Don't they work on Italians ?
Person2:Ha-ha . Birth control and abortion are four-letter words in my family .
Person1: And I heard that Italian men have very active libidos .
Example Output: informal

Example Input: Person1: What do you base our grades on ?
Person2:All of your coursework is important , including everything from attendance and homework to all of your test results for the semester .
Person1: Does the final count the most ?
Person2:All of it is important ; please just do your best at all times .
Person1: How do you total our scores ?
Person2:The final and mid-term are twenty percent each ; homework , attendance , and quizzes are the rest .
Person1: What if we are out sick ?
Person2:Make sure you contact me as I only allow one unexcused absence .
Person1: How can we know if we are doing OK during the year ?
Person2:Your grade will not be a surprise ; you will know what you need to work on .
Example Output: formal

Example Input: Person1: How much does it cost to hire a motorbike ?
Person2:For 3 days $ 300 , for 7 days $ 600 .
Person1: Good . I think I'll hire one for 7 days .
Person2:Okay . I'll write up the paperwork .
Example Output:
formal