Definition: 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'.
Input: Person1: I want to buy two tickets for tonight's concert .
Person2:Sure . How do you like your seats ?
Person1: Ordinary one , please .
Person2:Ok , here are your tickets in Row 13 .
Person1: I think they are too far from the stage . I want two in row 6 .
Person2:That's fine . But you have to pay another $ 10 .
Output:
informal