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'm reading an interesting report on Mars . 
 Person2:Oh , what does it say ? Does it say water could still exist under the surface of Mars ? 
 Person1:        Absolutely ! It says there is water on Mars buried beneath the surface . It's just a matter of how deep it is . 
 Person2:Then could the soil on Mars somehow be fertile enough to Groh simple plants ? 
 Person1:        The soil would need quite a bit of fertilizer to grow anything . And it would need to be protected from the UV radiation . 
 Person2:Actually , we are doing a project in school that involves landing a ship and staying on Mars for an extended period of time . Does NASA have any type of portable habitats that could be used to stay on the planet ? 
 Person1:        I'm not sure NASA has built any portable habitats for extended stays on Mars , but they have looked at various designs . 
 Person2:One of the most exciting things about Mars is that there could have bean life on it . What are your personal opinions on the life on Mars theory ? 
 Person1:        Well , I'm not really an expert in this area , but my understanding is that anything is possible . It's just that it is so hard to determine what went on 4.5 billion years ago . 
 Person2:But maybe there is a chance of gradually improving the surface and atmosphere of Mars so it may be inhabitable by humans . 
 Person1:        I'm skeptical . Mars is made of rocks containing silicon , iron , and various minerals . It also has an atmosphere of carbon dioxide . It is so different from what we have on earth , you know . 
 Person2:I'd still like to hope that some day we could set up a human colony there . 
 Person1:        But there are still other big problems we need to solve such as prolonged weightlessness , food storage , and a series of physiological effects . 

Answer: formal


Question:  Person1:       Ok , I ’ Ve got an up-to-day map . Let ’ s check the route from here to the airport . 
 Person2:Where are we ? Oh , here we are . So we drive to the A120 and turn left . 
 Person1:        No , we turn right . Remember that we are coming from this direction . 
 Person2:Oh yes ! Sorry ! Then we drive to the M11 motorway . 
 Person1:        How far is that ? 
 Person2:It ’ s only seven miles . We turn left to join the motorway and drive south . 
 Person1:        According to the map , we get off the M11 at the second junction and join the M25 . That ’ s the motorway that goes around the edge of London . 
 Person2:That ’ s another 15 miles , so that ’ s 22 miles total so far . 
 Person1:        Then we drive west on the M25 . we must be careful to turn in the right direction ! 
 Person2:Then we drive on the M25 . it turns south . When we reach exit 15 , we turn left and go west along the M4 . 
 Person1:        Then we take the first Heathrow Airport . What ’ s the total distance ? 
 Person2:The journey around the M25 is 33 miles and then 3 extra miles to get to the airport . So how many miles is that together ? 
 Person1:        22 miles to the M25 , 33 miles on the M25 , and 3 after that . That ’ s a total of 58 miles , isn ’ t it ? 
 Person2:It shouldn ’ t take us very long to cover that distance . Remember that we can go quite fast on the motor way . 
 Person1:        We can only go fast on the motor ways if there isn ’ t much traffic . I think we should allow ourselves plenty of time to get there . Being early is much better than being late . 

Answer: informal


Question:  Person1:       Our current apartment is valued at RIB 700,000 . We can sell it and put that money towards buying the new apartment .  
 Person2:Yeah , but we still need RIB 500,000 . Maybe we can use some of our savings to pay part of it .  
 Person1:        And we can take out a loan to pay the rest .  
 Person2:Great , so we can afford the new apartment after all !  
 Person1:        Uh huh ... but we're going to have to cut back on our shopping from now on . 

Answer:
informal


