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: Miss Gray , would you please type this report for me ?
Person2:Of course , Mr . Green .
Person1: Can you print it out before 12 o'clock ? I need it this afternoon .
Person2:No problem . I will do it immediately .
Person1: Please double space it and print it out on the laser printer so I can read it easily .
Person2:OK . Would you like this report done in a formal or informal style ?
Person1: Please type it in a formal style .
Person2:I see . Anything else ?
Person1: No , thanks .

Answer: formal

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: Have you heard about Anlesen David ?
Person2:No , have they have another fight ?
Person1: No , they got engaged .
Person2:You must be joking . Those two ?
Person1: Well , my dear . I didn't believe either . But got it straight form the horse's mouth . David called me this morning .
Person2:So when did all this happen ?
Person1: Last weekend , while they were on the Sik trip .
Person2:Well , I believe it now , and when are they are getting married ?
Person1: Next June .
Person2:I can hardly believe it .

Answer:
informal