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: What would you say if I told you I was going to quit school ?
Person2:I ' d say , think twice about it . Well , you are not going to quit school , are you ?
Person1: I don't know . I failed my exam .
Person2:What did you get ?
Person1: A B plus .
Person2:That's not bad .
Person1: But I should have aced it . I mean I finished the paper so quickly , thinking it's a piece of cake . But when I knew my result , I was like what ? That can't be true !
Person2:Listen , John . I understand that you are such an excellent student and I know you must have lots of stress , but you really want to give up ?
Person1: No , I don't . I just don't know how to handle this . This is my first time , you know .
Person2:I know . Don't worry . Do you know what you should do ?
Person1: What ?
Person2:You need to blow off some steam . The world is not on your shoulder .
Person1: How ?
Person2:Forget about school and exams . Come over to my house and have fun . I have some really good DVDs .
Person1: Thanks . But I really don't feel like watching movies tonight . I have to get an early start in the morning .
Person2:Then go to bed and have a good sleep .
Person1: I guess that's what I need . Thanks . You're being a really good friend .
Person2:Of course I am . Well , pleasant dreams !
Person1: Thanks , bye .
Example Output: informal

Example Input: Person1: Is this the A housing office ?
Person2:Yes , it is . Are you looking for housing for this semester ?
Person1: I was hoping to get into something on campus , but my friend told me that everything is full .
Person2:It is , but I can put you on a waiting list , if you would like .
Person1: Please . And in the mean time , can I look at apartments available in the area from this office ?
Person2:Yes , here is a catalog that is put out every year with locations that meet campus requirements for As .
Person1: Who do I talk to if I want I to see some of them ?
Person2:The individual landlord's numbers are next to each entry . You can call them with any questions you may have .
Example Output: formal

Example Input: Person1: I really like what you have . But the price for this product is much higher than we expected . I am absolutely not a buyer at that price .
Person2:I know it is not the cheapest on the market . But if you take the quality factor into consideration , you will find your company will benefit in the long term . This device is built in with the most advanced technology . Every aspect has reached the international standard . It is a worthwhile investment .
Person1: I understand that . If you can lower the price by 10 percent , we have a deal right now .
Person2:Well , the best I can do is to lower the price by 5 percent if you are willing to pay 90 % cash of front and 10 % on delivery . That is our best offer .
Person1: Err , well , I can ' t decide right now . Do you mind if I have a small internal discussion on this first ? I will tell you our decision this afternoon .
Person2:Sure , no problem .
Example Output:
informal