instruction:
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'.
question:
Person1: Excuse me , can you recommend some places for us to go tonight ?
Person2:Since it's your first time to Vienna , I think you should go to the concert .
Person1: Good idea . My wife has a fine ear for music . I am sure she would like it .
Person2:Have a nice evening .
answer:
formal

question:
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 !
answer:
informal

question:
Person1: Do you like music ?
Person2:Well , it depends .
Person1: Do you think the music is well-matched ?
Person2:No , I think the music is too fast .
Person1: How about the words of the song ?
Person2:It sounds nice .
Person1: I like it . Naturally it can arouse your feelings .
Person2:Yes , I think so . It's very emotional .
Person1: Of course , and I also like the rhythms .
Person2:Full of energy and hope .
Person1: Really . It's worth listening to and enjoying .
Person2:Certainly it is . It's worth an Academy Award .
answer:
informal