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: Do you know that John isn't going to come back to our school ?
Person2:Really ? Why ?
Person1: He had moved and held a party on July 1st .
Person2:It's a pity that I was traveling around Europe at that time .
Person1: Even he's not coming back to school anymore , you still can call him and meet him on weekends .
Person2:You're right ! I will call him this weekend and meet him .
Example Output: informal

Example Input: 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 .
Example Output: informal

Example Input: Person1: What a nice dress , Jean.You look marvelous !
Person2:You , too . Where did you get your new hat ?
Person1: From the Crown's . Oh , what lovely earrings you have ! Are they diamond ?
Person2:Yes . It's a birthday present from my husband !
Person1: Well , you are lucky to have such a considerate husband . Mine hasn't brought me a single rose since we married .
Person2:He'll come out with surprises . Just wait and see . Look at that woman , with the white chiffon !
Person1: She's chic , isn't she ?
Person2:Yes . I like the dress . It must be the latest fashion . Look , the hem has lowered , and the waist narrowed .
Person1: It makes me feel rather shabby . That woman has a good taste in dressing , I would say .
Person2:Yes . She dressed with an individual flair . I rather envy her .
Person1: Most women follow fashion like sheep.They don't know any better than imitate .
Person2:I quite agree with you.See the woman there ? I dare say she hasn't got any eyes . How could she match the mauve gown with the green handbag ? And all that jewelry !
Person1: The gown is quite expensive , believe me .
Person2:So what ? It only makes her look cheap and vulgar .
Person1: You know those upstarts . They're all show-offs ! I think I'd better have a diet ; otherwise I'd look like a ballon soon .
Person2:You're quite slim . In fact , if you were one of those starlets , the movie company would say you have a fabulous figure .
Person1: Thanks . I'm flattered .
Person2:Oh , my shoes pinch me . Let's find a seat and sit a while .
Example Output:
informal