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: Excuse me , Sir , do you know what time it is ?
Person2:Oh , it ' s almost eleven twenty .
Person1: Thank you .
Person2:You ' re welcome . The rain is quite heavy , isn ' t it ?
Person1: Yeah . I was in a hurry and I forgot my umbrella today .
Person2:I have one . We could share it . Which way are you going ?
Person1: Oh , that ' s very kind of you . I am going to the Garden Hotel .
Person2:I am going there , too . We can walk together .
Person1: Sure .

Ex Output:
formal

Ex Input:
Person1: In my country , we go to school from 8 o'clock in the morning until five in the afternoon .
Person2:Five days a week , too ?
Person1: Actually , five and a half.On Saturday , we have classes only in the morning .
Person2:Gosh !
Person1: That's too much for us really .
Person2:Where are you going now ?
Person1: I'm going to try to find out where the school is located .
Person2:When do you start school ?
Person1: I'm going to register right now .
Person2:That's good .

Ex Output:
informal

Ex Input:
Person1: You really should stop smoking , you know .
Person2:I know . I know . I don ' t smoke too much , though .
Person1: How many cigarettes do you smoke a day ?
Person2:About a pack , more if I drink .
Person1: Wow . You ' re really a heavy smoker .
Person2:No , I ' m not . My father smoked two packs a day for forty years .
Person1: He died of lung cancer , right ?
Person2:Yeah ... you ' re right . I really should stop smoking .

Ex Output:
formal