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: Isabelle , you know I'm not interested in fame .
Person2:Well , you don't seem to be interested in getting a real job , either .
Person1: You know I'm interested in teaching . I'm looking for jazz students ...
Person2:Yeah , and every high school student in town is banging on your door , right ?
Person1: I know they're out there . I'll find them .
Person2:You're such a dreamer ! You think that you can spread the word of jazz in an underpass ?

Ex Output:
formal

Ex Input:
Person1: Look ! There's even a built-in handle to carry it with .
Person2:But it's so thin . There's no way that it comes with a CD-ROM .
Person1: Oh , yes , it does . Look , here it says that the CD-ROM is built-in !
Person2:What other features are listed ?
Person1: It says that it comes in teal and tangerine .
Person2:Totally cool colors !
Person1: And it says that it sleeps .

Ex Output:
formal

Ex Input:
Person1: Hi , my name is Lean , and I'm from Russia .
Person2:Nice to meet you , Lean . My name is Alike . I'm from Japan .
Person1: To me English is a difficult language .
Person2:A second language is always difficult .
Person1: True , but English is harder than most . It's a crazy language .
Person2:A crazy language ? Why do you say that ?
Person1: One letter can have several pronunciations and one word can have several meanings .
Person2:No wonder you say English is a crazy language .

Ex Output:
informal