Instructions: 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: How happy you are ! Next Monday is your wedding day . Congratulations !
Person2:Thank you !
Person1: Fred is really a good guy . And he loves you so much .
Person2:Yeah . I'm lucky to be his wife .
Person1: He's after your own heart , it is important .
Person2:So he will make a perfect husband . Make sure you will be here next Monday .
Person1: I promise !
Output:
informal