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: Are you coming or not ?
Person2:I haven't decided yet .
Person1: Well , make up your mind . We need to know .
Person2:Ok , count me in .

Ex Output:
formal

Ex Input:
Person1: Do you like the Harry potter books and movies ?
Person2:Not really !
Person1: Why not ? They are very fun and exiting .
Person2:Maybe , but I think they are just for kids .
Person1: No , that ' s not true . Many adults like the Harry potter books too .
Person2:Maybe they don ' t agree with my taste .

Ex Output:
formal

Ex Input:
Person1: Hello , this is Francis from XYZ Company . I would like to discuss with you about a new project some time next week . Do you have time to meet ?
Person2:Well , I am not sure . Lets me check my agenda
Person1: Ok .
Person2:I am free on Tuesday afternoon from 2 PM to 4 PM , is it convenient for you ?
Person1: It is ok with me . So I will be arriving at your office around two fifteen PM .
Person2:Yes , there is . See you then .

Ex Output:
informal