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'.

[Q]: Person1: Your knowledge of English is really surprising .
Person2:Oh , it's nothing to speak of .
Person1: No , seriously . I am impressed .
Person2:Thank you . I appreciate the compliment .
Person1: Your knowledge of English is really surprising .
Person2:Oh , it's nothing to speak of .
Person1: No , seriously . I am impressed .
Person2:Thank you . I appreciate the compliment .
[A]: informal

[Q]: Person1: Hey , Jim . I didn ' t know you biked to work .
Person2:Yeah , it helps keep me fit and helps the environment , too .
Person1: One less car on the road means less pollution .
Person2:Right . Since my work is near a park , it ' s a really nice ride , too .
Person1: How far is it ?
Person2:Oh , about 10 miles . It takes me about an hour .
Person1: That doesn ' t sound too bad . I wish I could do it , but I work in the city . So I take the train .
Person2:You ' re doing your part for the environment by using public transportation , too .
Person1: True . Well , see you tomorrow .
Person2:See you .
[A]: informal

[Q]: Person1: Can you read what this says ?
Person2:Yes , and you could too if your hair wasn't hanging down in your face .
Person1: Don't dis my hair ! I like it like this .
Person2:You like it , but it's getting to be a handicap for you .
Person1: Hey , that's enough about my hair .
Person2:I know a great hairdresser not far from here and she is cute too .
Person1: I don't go to hairdressers because they're cute .
Person2:Did I mention she's good at cutting hair too ?
[A]:
formal