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: Are these your text books ? Biochemistry , General Ecology , Botany , Cell Genetics , Molecular Genetics ...
Person2:Yes . I gotta review all of them for the final exam . It is just around the corner .
Person1: Oh , right ! Do you have many exams at the end of each semester ?
Person2:That depends . Some semesters have many , some don't . And some courses don't have exams but only ask for papers . That's easy .
Person1: And when do you prepare for your final exam ?
Person2:Honestly speaking , most students prepare it one month before the exam .
Person1: Really ? You only review your lessons in one month ? Does it work ?
Person2:Of course , it's useful . And it's very crucial to have the copies of teacher's notes , because most questions in the exam are based on them .
Person1: Wow , and all the key points are included in them ? You're so smart !
Person2:But the exam is not as simple as you may imagine . We have to stay up late .
Person1: Do you have the classrooms open for the whole night ?
Person2:Yes , some people even pack up his bed quilt and sleep there . That's a little bit crazy .
informal

Person1: Did you hear about car accident on Spring Road yesterday ?
Person2:Yes , I did . I heard that they took both drivers to hospital . One needed surgery .
Person1: Yes . I heard he had a few broken bones too , but that the doctors have set the fractures without any problems .
Person2:The second driver was luckier . He had a concussion and needed some stitches for his head wound .
Person1: Yes . He was released from hospital yesterday evening . The other man could be there for weeks .
Person2:I understand that he ' s connected to a heart monitor and breathing apparatus . His condition can ' t be very good .
Person1: The hospital announced this morning that his condition is poor but stable . What does that mean ?
Person2:It means he ' s really badly injured , but he will almost certainly survive .
Person1: His family will be pleased to hear that . They must have been so worried .
formal

Person1: It's such a nice day outside . Let ' s take a walk into town and do some window-shopping .
Person2:You know I hate shopping more than anything else in this world .
Person1: I know . But we could get some exercise in , and we could get some errands run , too . Window-shopping won ' t cost you anything .
Person2:What kind of errands do we need to run ?
Person1: Well , we could go to the newsagent's to pick up the Sunday paper , go to the butcher's to pick up a chicken for a roast dinner , and to the chemist's to pick up your prescription from the doctor .
Person2:I'll only go if we can stop at the office-license to pick up something to drink for tonight .
Person1: Fine , we'll do that on the way home , so we don ' t have to carry it the whole time .
Person2:Sounds good . You have to promise not go into any of the stores in the mall though . I know how you like to try things on in the fitting rooms , especially if the stores have special offers .
Person1: I promise . We're only going for a walk to get some exercise and to get some things done that we haven ' t had time for .
Person2:Ok , let's go then !
Person1: Do you have any money ?
Person2:For what ?
Person1: For our errands , and maybe a little extra for something from a vendor on the street .
Person2:You said you were only going to window shop !
Person1: I agreed to not go into the mall , but I can still look at things in the market !
Person2:I should have known ...
informal