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: Hey ! Fred , you are five minutes earlier than me today . Usually , you don't .
Person2:Hurry ! It is time for me to steal something .
Person1: What's your meaning ?
Person2:I am stealing vegetables at the Happy Farm .
Person1: You are a thief ?
Person2:No , no . I mean stealing vegetables on Internet is very popular now . Many white collars join in this game and have a lot of fun by stealing others ' vegetables .
Person1: You mean it is a still virtual game . Your friends steal your vegetables time and time again , and you take theirs as well , right ?
Person2:You got what I meant . Perhaps , what I steal are not vegetables , but loneliness .
Person1: Don't be addicted to the game . It's not good for your job .

Ex Output:
formal

Ex Input:
Person1: Don't just stand outside . Come on in .
Person2:Yeah .
Person1: This is Alex . Remember ? This is Sean .
Person2:Nice to meet you guys .
Person1: Over there are Stacy and Rebecca . We're all on the school's tennis team .
Person2:Who's that guy who's handing out beer to everyone ?
Person1: That's my boyfriend Matt . Isn't he cute ?
Person2:He sure is !
Person1: Come on . I'll introduce you two .

Ex Output:
informal

Ex Input:
Person1: Don't be shy . Have some more chicken .
Person2:Thanks .

Ex Output:
informal