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: Oh , my god . How can you stand living in such a messy dorm ?
Person2:Our place is spotlessly clean , compared with others .
Person1: Have you even tried to clean it once since you moved in at the beginning of the semester ?
Person2:In fact , I just swept the floor three days ago .
Person1: I think we need to restart the dormitory sanitation inspection system .
Person2:I bet nobody will care about it .
[A]: informal

[Q]: Person1: T he nineteenth of June is my birthday . I'm planning to have a small party . Could you come ?
Person2:Happy birthday to you ! I'd really love to come , but I'm not sure right now . I'll try to make it.Thank you for your invitation .
[A]: informal

[Q]: Person1: Why don't we get ourselves a new car ? The old one's falling apart .
Person2:What a good idea !
Person1: What kind shall we get ?
Person2:We could go to more places this time , if you liked .
Person1: Yes , fine .
Person2:When shall we go and look ?
Person1: Why not sometime next week ?
Person2:No , let's go on Saturday .
Person1: OK .
Person2:Where shall we go ?
Person1: There's a car dealer down the road.How about going there ?
Person2:No , I don't like that place.Why don't we try the garage Martin recommended ?
Person1: Fine , We'll do that .
[A]:
informal