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: I don't think we come here at a right time .
Person2:What's wrong ?
Person1: The museum doesn't open today .
Person2:What a pity !
Person1: Where shall we go now ?
Person2:Why not have a visit to the zoo ?
answer:
informal

question:
Person1: Good afternoon . Reservations . May I help you ?
Person2:Yes , I'm calling from Tenga Company . I'd like to know if you have rooms available for the nights from October 8 to October 12 . We are going to have a business conference .
Person1: May I ask how many people there will be in the party ?
Person2:20 persons .
Person1: What kind of room would you like ?
Person2:Double rooms with twin beds .
Person1: A moment please , sir . Yes , I can confirm 10 rooms for those days .
Person2:Thank you . Is there a special rate for a group reservation ?
Person1: Yes , there is a 10 percent discount .
Person2:That is fine .
answer:
formal

question:
Person1: John , have you ever watched Beijing Opera ?
Person2:Yes , I watched once .
Person1: What do you think of it ?
Person2:Well , honestly speaking , I went to watch it out of curiosity . I ' d say it ' s really a special art form .
Person1: I couldn ' t agree more . Actually , I ' m a Beijing Opera fan .
Person2:Really ? Good for you .
answer:
informal