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'.
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Question: Person1: What's taking you so long ?
Person2:Don't worry . I'm almost finished .
Person1: I need you to hurry up .
Person2:All right . I'm finished .
Person1: I think there's more you need to do .
Person2:What do you mean by that ?
Person1: My hair looks awful .
Person2:What don't you like about it ?
Person1: I just don't like my hair .
Person2:I'm sorry that you don't like it .
Person1: I won't be paying you for this .
Person2:I'm sure we can work something out .

Answer: informal

Question: Person1: Hi ! Someone has reported a fault on one of your copiers .
Person2:That's right . I'm glad you're here . It hasn't been working properly for the last few days .
Person1: When was it serviced ?
Person2:Just a couple of weeks ago . It's usually very reliable .
Person1: What's actually wrong with it ?
Person2:Well , it's making a strange noise when we try to change paper trays .
Person1: I'm sure it's nothing serious , probably just a minor fault . I'll have a look at it .

Answer: formal

Question: Person1: Bob refused all his classmates ' invitation .
Person2:I really couldn't understand him .
Person1: He is surely a hard nut , nobody likes approaching him .
Person2:We'd better leave him alone .

Answer:
informal