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'.

Input: Consider Input: 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 .

Output: informal

Input: Consider Input: Person1: The weather is terrible .
Person2:Yes . It was sunny and warm yesterday but the wind is really blowing hard now .
Person1: I'm wearing my heavy jacket .
Person2:I'm going to put on more clothes , too .
Person1: Will it snow today ?
Person2:I don't know . Do you like snowing ?
Person1: Yes , when it snows , every where is white . It's very beautiful .
Person2:You can read the newspaper . Maybe it will tell you whether it will snow or not .
Person1: Good idea .

Output: informal

Input: Consider Input: Person1: Let's go to the cinema tonight , shall we ?
Person2:Good idea . Is there a good movie on ?
Person1: What about ' Farewell My Concubine ' ? I've been wanting to see it for a long time .
Person2:All right . But it'll be difficult to buy tickets I suppose .
Person1: My brother has offered me two tickets for this evening .
Person2:What time does it begin ?
Person1: At eight thirty .
Person2:I'll come for you at about eight .
Person1: OK , I'll be waiting .
Output: informal