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: 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 seem to be very hesitant about doing things .
Person2:I don't know why I cannot take a step forward .
Person1: You are meeting trouble halfway , I guess .
Person2:Many things are troubling me . I don't know whether I should come and go .
Person1: That's where the shoe pinches .

Ex Output:
informal

Ex Input:
Person1: I want to buy a gift for my father . Will you go with me to choose one for him ?
Person2:Sure . Is it your father's birthday ?
Person1: Don't you know ? Tomorrow is Father's Day .
Person2:Oh ! How could I forget such an important holiday ?
Person1: You also need to choose a gift for your father , right ?
Person2:Yes , let's go .

Ex Output:
informal