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: We're having a sixties party next week . Do you want to come ?
Person2:What is a sixties party ?
Person1: You come dressed in anything from the sixties .
Person2:That sounds like fun . But where can I get clothes that old ?
Person1: Check out your mom's closet . I'll bet she still has something .
Person2:Good idea . Can I bring some music from that period too ?
Person1: That will be great ! Do you have LPs or Cds ?
Person2:Don't tell me you have a record player !
Output:
informal