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: We're leaving now .
Person2:Here's your bill .
Person1: Right . And would you please forward our mail to this address ?
Person2:Certainly .
Person1: Thank you . Goodbye .
Person2:Goodbye . Hope to see you again .

Ex Output:
informal

Ex Input:
Person1: You ready ?
Person2:Am I ready for what ?
Person1: Are you ready to transfer to a new school tomorrow ?
Person2:Oh . Yes , I ' m ready to transfer .
Person1: You ' re not nervous , are you ?
Person2:I ' m very nervous .
Person1: Why are you nervous ?
Person2:I ' m not going to know anybody there .
Person1: That ' s not a problem .
Person2:That makes me nervous .
Person1: It ' s fun meeting new people .
Person2:I didn ' t think about it that way .

Ex Output:
formal

Ex Input:
Person1: Jane , pleases come with us .
Person2:I cannot dance , you know . I have't such a talent .
Person1: Just for fun , not for showing . What do you worry about ?
Person2:Nothing . I have told you before that I won't go to the party and that's flat .
Person1: But ... OK .

Ex Output:
formal