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: Hello , Mrs Turnbull . How are you ?
Person2:Fine , thanks . How's your boy , Jack ?
Person1: He's a bit tired . You know , he goes to school at eight o'clock every morning.He doesn't get home till after four . then he does his homework after tea . It often takes him a couple of hours to finish
Person2:Poor boy . They work hard at school nowadays , don't they ? Does he like it ?
Person1: School , you mean ? Yes , he does . He likes his teachers , and that always makes difference .
Person2:Yes , it does . Does he go to school by bus ?
Person1: No , he walks . He likes walking . He meets some of his friends at the corner another go together .
Person2:What does he do when it rains ?
Person1: My husband takes him in the car . He passes the school on the way to the office .
Example Output: formal

Example Input: Person1: Do you want to go out for dinner tonight ?
Person2:Sure . Have you got anywhere in mind ?
Person1: I'm starving , so maybe we could go somewhere with large portions .
Person2:That Italian restaurant in the city centre always has large portions . Do you want to go there ?
Person1: I'm not really in the mood for Italian , actually . I was thinking of something a bit spicy .
Person2:If you want spicy food , then I'd recommend going to a Thai , Indian or Chinese restaurant . How about that Chinese buffet on Cowley Road ?
Person1: I really like that restaurant ; you get a lot for your money there . But , they've westernized their food , so it's not actually that spicy .
Person2:You're right . Most of their dishes have sweet sauces . We could try that Indian restaurant just down the road from us .
Person1: The Taj ? They're a bit expensive , but they do serve large portions of very hot food .
Person2:The Taj it is then .
Person1: Shall we bring our own bottle of wine to save some money ?
Person2:They'll still charge us a corkage fee .
Person1: That's right . It'll probably work out to be about the same then anyway .
Person2:Don't worry about money . I'll treat you tonight .
Person1: Are you sure ? We could go Dutch .
Person2:No , I'll pay . It's my turn anyway . You paid last time .
Person1: I won't argue with that ! Let's go !
Example Output: informal

Example Input: Person1: Did you watch the Premiership last night ?
Person2:Yes , I watched United play Chelsea . What a fierce battle ! allay were engaged in intensive pressing and tackling in midfield . Well , it was not like a normal English League match .
Person1: No , it wasn't . Rather , it looked like a Bundesliga match , where physical contact is so frequent . English League teams are apt to pass the midfield quickly with long passes . It seems to me English soccer players are very gentlemanly . As Diego Maradona spoke teasingly , they often knew only chasing hard after the ball , but forgot to steal it .
Person2:Haha . That's probably why slide tackle and fouls are less common , and offsides more frequent in English League matches than those on the Continent . And the ball is often kept flying overhead , drawing beautiful curves in the sky . Such games are quite pleasing to the eye .
Person1: Which team do you back then ?
Person2:I'm a firm United supporter . I like their playing style . The Reds always have several excellent wing-backs , Like Riggs , Peckham and Gary Neville . They often make wonderful crosses when they assist in attacking .
Person1: But the Reds keep a weak midfield . I think Juventas of Italian Series A have always maintained a very formidable midfield . It is the main source of its strength .
Example Output:
formal