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'.

Person1: Hi , Sara , what are you reading ?
Person2:Hi , John , I am trying to find a carpenter .
Person1: Why ?
Person2:Well , I want to build a deck in my back yard .
Person1: What for ?
Person2:So I can have a special place to hang out with friends , and also do some barbecuing on weekends .
Person1: That sounds cool . Do you mind if I recommend myself for the job ?
Person2:You ? Do you have a carpenter's license ?
Person1: Yes , of course . But I only freelance on weekends with my uncle .
Person2:Wow ! That's cool . So , let me give you some details about the deck I want .
Person1: Please go ahead , I am listening .
Person2:I'd like my deck to be at the same level as the back door .
Person1: Is your back door higher than the ground level ?
Person2:Yes , the back door is about four or five steps higher than the ground .
Person1: Okay , then you need a deck with a guardrail .
Person2:I don't like things to be fancy .
Person1: Don't worry . I will build your deck with a simple but classic look .
Person2:Hmm , that's good . Can you use cedar or redwood to build it ?
Person1: Cedar is a good choice .
Person2:Well , let's take the measurements right now .
informal

Person1: Lester , you are really fantastic at automobile repair .
Person2:Thanks , June . But I think I need to be certified as a mechanic before I ' m allowed to repair cars for a living .
Person1: That ' s not a big problem . There are many small schools for adults like you who can study to be certified .
Person2:I guess I never thought of that before .
Person1: And you can easily get a student loan from a vocational school , or from the government .
Person2:Wow , you ' Ve inspired me to do something !
informal

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 .
informal