instruction:
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'.
question:
Person1: Oh , Ralph , I heard it is very dangerous traveling in space . Disasters have happened before . If the spaceship were out of order . . .
Person2:You should be optimistic about this . Things have taken a good turn . You should remember that less than two centuries ago the dangers of train travel seemed similarly terrible .
Person1: But is it possible that travelers could be hit by meteors ?
Person2:It's once in blue moon .
Person1: What do you think is the real danger man faced in space ?
Person2:The main one is radiation . There are two sorts of radiation man must fear in space . The first is radiation from the sun , and this is particularly dangerous when the sun is very active and explosions are occurring on its surface . The second , less harmful , comes from the so-called Van Allen Belts .
answer:
formal

question:
Person1: Kim ! I'm here ! I brought all my old maternity clothes plus Dave and Alice's baby clothes !
Person2:It's a little early for those , isn't it ? I still have eight months to go ...
Person1: Believe me , the time will fly by ! Before you know it , you'll be changing diapers ! You have to start preparing !
Person2:I thought we could turn the upstairs study into a baby room . What do you think about lavender ?
Person1: I'll be back tomorrow with my work clothes and a gallon of lavender paint ! You just sit back and relax !
answer:
informal

question:
Person1: My brother gave me a baby cat yesterday . I can keep it as my pet .
Person2:I don ' t understand . Why do you want a cat ?
Person1: Cats are beautiful and lovely , aren ' t they ?
Person2:No , cats are too dirty . They are lazy and cunning . I don ' t like them at all .
Person1: I don ' t think so . I think cats are sweet .
Person2:You can keep the cat , but you should keep it away from me .
answer:
informal