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: Why do you want to be a teacher ?
Person2:It's a job I've been dreaming of since I was very little . I firmly believe that teaching is one of the most honorable jobs in the world .
Person1: In what department do you wish to work if we hire you ?
Person2:I want to work in the English Department , as I am an English major .

Ex Output:
formal

Ex Input:
Person1: Shall we go for a drive today ?
Person2:It feels like there's going to be rain later .
Person1: Maybe you're right .
Person2:We'll go tomorrow .

Ex Output:
informal

Ex Input:
Person1: What games do you like ?
Person2:I like word games .
Person1: How about a game of bridge ?
Person2:I don't like it at all .
Person1: What about guessing games ?
Person2:I'm not one for the games .
Person1: Let's play other game .
Person2:What about playing go ?
Person1: OK .

Ex Output:
formal