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: Hi , Tom . You forgot to put on your sports shoes ! It's Games Day today !
Person2:Well , I have them in my bag . I'Il put them on right away !
Person1: Let me give you a hand . You are carrying so many books .
Person2:Thanks !
Person1: Have you forgotten the cheers ?
Person2:No , I haven't . I've tried hard to remember and I'm quite sure I've memorized the rhythm correctly .
Person1: That's good !

Ex Output:
informal

Ex Input:
Person1: Hey , Zina . You're here early today .
Person2:Yeah , I'm going to be making phone calls all day . What a blast .
Person1: I just wanted to say thanks for putting us on the map so fast . I appreciate it .
Person2:Save it , Vince . After I put my first million in the bank , I'll say you're welcome .
Person1: Fair enough.Keep up the good work .

Ex Output:
informal

Ex Input:
Person1: What type of music do you like to listen to ?
Person2:I like listening to different kinds of music .
Person1: Like what , for instance ?
Person2:I enjoy Rock and R & B .
Person1: Why is that ?
Person2:I like the different instruments that they use .
Person1: That's a good reason to like something .
Person2:Yeah , I think so too .

Ex Output:
informal