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: How are you getting along with your paper ?
Person2:I haven't finished it . It is very difficult .
Person1: You should hand it in before next Sunday .
Person2:Oh , I know . I will try my best .
Person1: I believe you can do a good job .

Ex Output:
formal

Ex Input:
Person1: Hi , how are you doing ?
Person2:I'm fine . How about yourself ?
Person1: I'm pretty good . Thanks for asking .
Person2:No problem . So how have you been ?
Person1: I've been great . What about you ?
Person2:I've been good . I'm in school right now .
Person1: What school do you go to ?
Person2:I go to PCC .
Person1: Do you like it there ?
Person2:It's okay . It's a really big campus .
Person1: Good luck with school .
Person2:Thank you very much .

Ex Output:
informal

Ex Input:
Person1: Excuse me , but I'm looking for a gift for my friend .
Person2:Is it a Chinese New Year's gift or a birthday gift ?
Person1: Well , it's a wedding gift .
Person2:Oh , I see . Let me guess ... something sexy for the new bride on her first night of marriage ?
Person1: Basically . But I have no idea what to get ! She's American and kind of ...
Person2:Well-endowed ? Don't worry . I have some bras with bigger cup sizes in the back .

Ex Output:
formal