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'.

Example Input: Person1: Do you know how to go to the Fragrant Hills in Beijing ? I heard that they are very famous in China .
Person2:Yes . Especially in autumn , the red leaves of the maple trees make the whole mountain red .
Person1: That must be very beautiful .
Person2:Yes , it can make people feel as if they were in the land of fairies .
Person1: Really ? Have you ever been there ?
Person2:A couple of times .
Person1: Can you go there with me ? I'd like someone who is familiar with that area to go with me .
Person2:Sure . I'd be very glad to be your tour guide .
Example Output: informal

Example Input: Person1: Hey , Jack , where's your car ?
Person2:I got rid of that clunker . This is my new one .
Person1: Is that right ? It sure beats the old one ?
Person2:Jump in , I'll give you a ride .
Person1: Ok . Boy , this looks expensive .
Person2:Yeah , it costed a bundle alright .
Person1: Wow , this's sinking a hole .
Person2:Yeah , this sucker is the fastest thing I've ever owned .
Person1: I believe it . Hoo , this car corners like it's on rails .
Person2:We are on the high way . I'm the * * .
Person1: Wow , this car can really burn rubber .
Person2:It's a great feeling .
Person1: You made a perfect choice , Jack .
Person2:Thanks , Daisy .
Example Output: informal

Example Input: Person1: Hi , my name is Ted , what ' s yours ?
Person2:What ?
Person1: I said , I ' m Ted , who are you ?
Person2:Huh ? Oh , my name is Laura .
Person1: Do you somewhere often , Laura ?
Person2:Huh ? I can ' t hear you , the music ' s too loud .
Person1: Let ' s go outside and talk . So Laura , do you come here often ?
Person2:Hold on , my ears are still ringing from the music ... what was it you asked me ?
Person1: I asked if you come here often .
Person2:Sometimes , usually once every few weeks . Do you ?
Person1: No , this is my first time here .
Person2:I usually come with a group of friends . We dance a little , have a few drinks , and just have a good time .
Person1: Yeah , that ' s why I ' m here . My friends dragged me here , because they think I spend too much time studying .
Person2:That ' s good . It ' s good to hit the books , but you need to get out once in a while .
Person1: I guess so . But the music is too loud . I don ' t mind getting out and meeting people , but next time I ' ll do it in a park .
Example Output:
formal