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: I can't believe Mr . Fro didn't buy it . Who does that guy think he is anyway ? Bill Gates ?
Person2:He had a lot of nerve telling us our ads sucked .
Person1: Time to order . Balista , today I want a skinny triple latte .
Person2:When did you start worrying about your weight ?
Person1: I'm not . I just don't feel like drinking whole milk today . Why ? Do you think I'm fat ?
Person2:No , Jess , chill out !

Answer: formal

Question: Person1: Excuse me , sir ? I just need a little bit more information . Could you tell me your telephone number and mailing address ?
Person2:Sure . My number is 545-8897 , and I live at 908 Mulbury Street .
Person1: That ' s 545-8897 and your mailing address is 908 Mulbury Street . The zip code is 20310 , right ?
Person2:That ' s right .

Answer: formal

Question: Person1: Boy , come here !
Person2:Yes , sir ! What can I do for you ?
Person1: Bring me a cup of coffee , please .
Person2:Will you have it strong or weak ?
Person1: I prefer strong .

Answer:
formal