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: How may I help you ?
Person2:I want to return this video .
Person1: Is that all you need ?
Person2:I also need to check these books out .
Person1: Anything else ?
Person2:That ' s everything .
Person1: I need your library card .
Person2:I have it . Here you go .
Person1: Do you need anything else ?
Person2:That ' s everything .
Person1: Your books are due back two weeks from today .
Person2:Thank you . Good night .

A: formal
****
Q: Person1: Charles , have you finished your homework ?
Person2:Not yet , Grandma , What's the matter ?
Person1: I want you to have a walk with me .
Person2:I'll finish soon .

A: formal
****
Q: Person1: What are you doing ?
Person2:I ' m just looking at this map of the world . I ' m preparing for a geography class .
Person1: There are no countries marked on the map .
Person2:No , there aren ' t . this map just show the geographical features . Look at the Himalayan plateau with the highest peaks in the world .
Person1: The thing that I find most surprising is that most of the world is covered with water . Compared to the oceans , most countries are tiny .
Person2:I find it incredible how millions of years of volcanic activity have created mountains thousands of metres tall .
Person1: Rivers have created deep valleys and canyons like the grand can you .
Person2:The oceans and landscapes all influence our climate .
Person1: It ' s all so interesting . I ' ll have to find more information about it on the internet . Or perhaps I should try and attend your geography class .

A:
informal
****