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: what do you think about this store ? I heard it ' s a posh store that ' s only got branches in big cities .
Person2:I love this store . The only problem is that it ' s extremely expensive .
Person1: don ' t worry . I ' Ve decided that for your birthday I ' m going to take you shopping for a new dress .
Person2:really ? I thought you hated shopping ?
Person1: I do , that ' s why you should appreciate this gift !
Person2:sure . That ' s really nice of you . Let ' s go in and try some things on .
Person1: how about this red dress ? I think it would really suit you .
Person2:that ' s gorgeous ! Do they have it in a size 8 ?
Person1: here you go.On any other day , it would cost me a fortune , but it ' s on special offer today .
Person2:I think this color isn ' t quite right for me . Do they have the same dress in white ?
Person1: let me look . Let ' s see ... they ' Ve got one in blue , green , pink , black ... and white . Here you are .
Person2:this is perfect ! What do you think ?
Person1: I think you look fantastic . Happy Birthday !
Person2:I ' m so lucky . You only get a chance like this once in a blue moon ! Thanks honey !

Ex Output:
informal

Ex Input:
Person1: Hello , Mrs Turnbull . How are you ?
Person2:Fine , thanks . How's your boy , Jack ?
Person1: He's a bit tired . You know , he goes to school at eight o'clock every morning.He doesn't get home till after four . then he does his homework after tea . It often takes him a couple of hours to finish
Person2:Poor boy . They work hard at school nowadays , don't they ? Does he like it ?
Person1: School , you mean ? Yes , he does . He likes his teachers , and that always makes difference .
Person2:Yes , it does . Does he go to school by bus ?
Person1: No , he walks . He likes walking . He meets some of his friends at the corner another go together .
Person2:What does he do when it rains ?
Person1: My husband takes him in the car . He passes the school on the way to the office .

Ex Output:
formal

Ex Input:
Person1: Is this your brother-in-law ?
Person2:Yes , he married my sister ten years ago .
Person1: From his looks , I'd say he's a man of character .
Person2:Yes , my sister loves his personality .

Ex Output:
formal