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 , 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 .
answer:
informal

question:
Person1: Hi , I want to see the Terra Cotta Warriors in Xi'an . Could you please remind me when we are arriving at that stop ?
Person2:Oh . You took the wrong bus . You need to take Bus 151 which goes the opposite direction .
Person1: Oh , no ! What should I do now ?
Person2:Don't worry . You can get off at the next stop and walk across the street and take the Bus 151 to the opposite direction .
Person1: Ok . How many stops do I have to go ?
Person2:About 15 stops .
Person1: That is a long way to go . It is so kind of you to help me . Thank you very much .
Person2:My pleasure .
answer:
informal

question:
Person1: Is anything the matter , sir ?
Person2:Yes , it's my steak .
Person1: What's wrong with it , sir ?
Person2:It's too raw . I wanted mine well done , but this one here is almost medium .
Person1: I am sorry you didn't enjoy it , sir . I will return it to the kitchen and bring you one that is well cooked . How is your steak this time , sir ?
Person2:Very good . It's done just right this time , thank you .
Person1: I am glad you enjoy it . I will tell this to the chef . Would you like some more beer ?
Person2:Yes , please give me another Calsberg .
Person1: Can I bring you some dessert ?
Person2:No , thank you . I've had enough .
Person1: How about some coffee or tea then ?
Person2:Yes , I will have a cup of coffee .
answer:
informal