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'.

[EX 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 .
[EX A]: informal

[EX Q]: Person1: Peter and Mary broke up .
Person2:Are you serious ?
[EX A]: formal

[EX Q]: Person1: Mary , how was your date with John ?
Person2:It ' s OK . It seems we have a lot in common .
Person1: Oh , really ? That is great news . What does he look like ?
Person2:He is tall and slim , fair-haired .
Person1: Sounds like he is pretty cute . What do you think of him ?
Person2:He is a nice guy and very considerate . I am impressed with how smart and humorous .
Person1: Oh , it ' s love at first sight .
[EX A]:
informal