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'.

Ex Input:
Person1: Hey ! What's up ?
Person2:Hi , John ! I haven't seen you for ages .
Person1: Yeah , I've been out of town .
Person2:So how have you been ?
Person1: Great ! Work is really busy now , but it's fun .

Ex Output:
informal

Ex Input:
Person1: I ' m thinking about redecorating my bedroom . I bought this magazine in order to get some ideas . What do you think of this ?
Person2:That looks good . The room in the picture is bigger than your bedroom , so you wouldn ' t be able to have all that furniture in your room .
Person1: I ' d like to have the bed and the wardrobe .
Person2:You would fit both of them in your bedroom . Perhaps you could also get the dressing table . I think that one would look good in your bedroom .
Person1: Yes , it would . It ' s very expensive though .
Person2:Everything in this magazine seems expensive . You could probably find something similar in a discount store .
Person1: Yes . I ' m sure I could find something similar at one . I ' d also like to get a new carpet for my bedroom .
Person2:You can get cheap carpets easily . Another idea is to buy a rug . That would cover a lot of the carpet and you wouldn ' t have to replace the carpet . It would save you a lot of work .
Person1: That ' s a good idea . I ' m really looking forward to redoing my bedroom .

Ex Output:
informal

Ex Input:
Person1: Would you like to come over for dinner tonight ?
Person2:Sure , but I have to tell you that I've become a vegetarian . I don't eat any kind of meat .
Person1: When did you decide to become a vegetarian ?
Person2:I saw a program a few months ago about how animals are raised for human consumption . I haven't been able to eat a single piece of meat since .
Person1: That's great . Do you find that you eat a lot more fruit and vegetables now ?
Person2:Definitely . I've also been buying organic fruit and vegetables , which is more expensive , but much better for you because they don't have any pesticides on them .
Person1: You've really turned into a health nut , haven't you ?
Person2:I guess you could say that . Eating fruit and vegetables helps keep you healthy . I've lost 5 pounds and I feel great !
Person1: How do you get enough protein in your diet ?
Person2:Well , I eat a lot more tofu , beans , nuts and some fish .
Person1: Well , don't worry about dinner . I'll only make vegetarian dishes for you . Do you like sushi ?
Person2:I prefer cooked fish to raw fish , but if you really like it , make it .
Person1: How about a spicy tofu and vegetable stir-fry ?
Person2:That sounds great . What time should I come over ?
Person1: Dinner will be ready at about 7:30 pm , so you can come over at 7 p . m .
Person2:Sounds good . See you there !

Ex Output:
informal