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'.

Example input: Person1:      Hey man , you wanna buy some weed ?  
 Person2:Some what ?  
 Person 1:Weed ! You know ? Pot , Ganja , Mary Jane some chronic !  
 Person2: Oh , umm , no thanks . 
 Person1:      I also have blow if you prefer to do a few lines . 
 Person2: No , I am ok , really . 
 Person1:      Come on man ! I even got dope and acid ! Try some ! 
 Person2: Do you really have all of these drugs ? Where do you get them from ? 
 Person1:      I got my connections ! Just tell me what you want and I ’ ll even give you one ounce for free . 
 Person2: Sounds good ! Let ’ s see , I want . 
 Person1:      Yeah ?  
 Person2:I want you to put your hands behind your head ! You are under arrest ! 
Example output: informal
Example explanation: Based on the conversation, we can see that there is a presence of exclamation which is not present in a formal discussion. Therefore this is an informal conversation
Q:  Person1:       Could you tell me something about the Mid-Autumn Festival ? I find it also very interesting . 
 Person2:OK . It falls on the 15th day of the eighth lunar month . It is said that there is a beautiful goddess Chang'E on the moon who had eaten some sort of elixir and had to depart her husband . She is always expecting to see her husband again . So , later we have the traditional idea that when there is the full moon , it is time for the family members to come together . 
 Person1:        So , I understand why people eat moon cakes on that day . 
 Person2:You are right . In China , ' round ' is an auspicious word . The moon cakes are in round shape . 
 Person1:        Is it official ? 
 Person2:It was not in the past . But from 2008 , we can enjoy a three-day holiday for this festival . 
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
informal