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'.

Q: Person1: Where's your better half ?
Person2:She's at home .

A: formal
****
Q: Person1: Can you tell me the time ? I've got an appointment at 8: 30 .
Person2:It's 8 sharp by my watch .
Person1: Gee ! There's only thirty minutes to go .

A: informal
****
Q: Person1: If the weatherman's predictions are accurate , it should rain tomorrow .
Person2:I hope not . Then we'd have to reschedule our baseball game .

A:
informal
****