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'.

[EX Q]: Person1: My computer isn ' t running at the same speed it used to be , it is testing my patience everyday . Can you tell me how to make it run faster ?
Person2:If you want to speed up your system , you ' Ve got to clean it up first .
Person1: How ?
Person2:You need to free your disk space . The simplest way is to use a Disk-Cleanup tool to remove temporary files and in store programs that you no longer use . Things should be fine next time you start . You also need to control what starts up . There is a program calls Start-up Delayer , It can help to set after how much time programs should be loaded after Windows boosts . For example , you can choose to set your Fox Mail program to load 30 seconds after Windows starts up .
Person1: Very useful advice , I will try them right now .
[EX A]: formal

[EX Q]: Person1: Hey Lucas , how was your trip to Paris ?
Person2:It was wonderful , but I was so tired .
Person1: Did you go to the top of the Eiffel Tower .
Person2:Yes , that was the first thing we did . We went all the way to the top . There were visitorsfrom all over the world taking photos there .
Person1: What else did you see ?
Person2:Art galleries , cathedrals , statues , fountains , palaces , bistros , there's really too much to say .
Person1: You must have had a great time .
Person2:Yes , at the beginning we were all excited and had lots of fun . However , on the third day of travelling in the city , I felt sick I think I had something bad to eat but it passed by the evening .
Person1: Yes . you need to be careful with what you eat when you're abroad.sometimes new food might disagree with you .
Person2:On the fourth day , we went to taste the French cuisine . That was really fantastic . And no stomach problems .
Person1: That is great . Everyone says French food is wonderful .
Person2:You'll have to try for yourself some day .
[EX A]: informal

[EX Q]: Person1: Dora , are you interested in going to the museum with me tomorrow ? I read the newspaper this morning . I know there is an art exhibition in Taipei Modern Art Museum .
Person2:Sure . I am free tomorrow . It sounds interesting to me . Can we buy the ticket online ?
Person1: I don't think so . I think we had better go there earlier , or we may have to spend a lot of time waiting .
Person2:I guess that is the thing we can do with we really want to visit the museum .
Person1: Look at the ticket booth in the center . There seems to be not as many people as we thought it would be .
Person2:Yeah . We are lucky . Let's go buy the tickets first . We can have breakfast later . I am so hungry .
Person1: Good idea .
Person2:( After the breakfast ) Which floor is the art exhibition we are going to ?
Person1: I have no idea . Let me take a closer look at my museum map
Person2:Sure , take your time . We have a whole day .
Person1: It's on the 2nd floor . We are going to see some beautiful paintings about the history of ancient Greece .
Person2:Look at the museum guide.It says there are also some sculptures and potteries in this area . Let's rent an audio guide .
[EX A]:
informal