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: 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: Way to go ! It seems beautiful and very delicious .
Person2:Thank you.Thanks to the baker , I benefit a lot from him .
answer:
informal

question:
Person1: That girl looks very attractive , doesn ' t she ?
Person2:Do you think so ? I don ' t like girls who look like that . I like girls who aren ' t too slim . If you like her , go and talk to her .
Person1: I ' d like to , but there ' s her boyfriend . He ' s very broad-shouldered .
Person2:He ' s huge ! He must go to the gym to have a well-built body like that .
Person1: Do you prefer tall girls or short ones ?
Person2:I don ' t mind , but I like girls with long hair .
Person1: We have different tastes . I like girls with short hair . I like tall girls - probably because I ' m so tall myself .
Person2:Have you ever dated a girl taller than you ?
Person1: No , never . I don ' t think I ' Ve ever met a girl taller than me ! Have you gained weight recently ?
Person2:Yes , I have . Perhaps I should go to the gym , like that girl ' s boyfriend .
Person1: I'm getting a bit plump myself . Perhaps I ' ll go with you .
answer:
formal