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: I'm not comfortable about this , Sandy . I don't understand most of these games .
Person2:That's okay . I can explain a little .
Person1: I don't want to lose all my money .
Person2:Don't worry . You can't lose all your money.because you won't gamble all your money .
Person1: I guess you're right .
Person2:Of course I'm right . I already told you the rule for Las Vegas . Remember ?
Person1: Yes , I remember.You must decide how much money you will gamble before you start to play .
Person2:That's right . That's the best way to have control over yourself.You say to yourself . Tonight I will gamble fifty dollars . Only fifty dollars . No more.If you follow the rule , you can't lose more than fifty dollars .
Person1: I know it's true , Sandy . But still some people lose control.They start to gamble , and they can't stop .
Person2:But I won't let you do that . I will watch you .
Person1: Okay .
Person2:So how much do you want to gamble ?
Person1: Maybe 500 dollars .
Person2:500 dollars ! That's too much ! You just said you are afraid to lose your money.If you're afraid , why do you want to gamble 500 dollars ?
Person1: I don't want people to think I'm stingy .
Person2:That is a bad attitude to have , Karen ! If you think that way , Las Vegas will be really dangerous for you .
Example Output: informal

Example Input: Person1: This is the good life ! We have it good don ' t you think ?
Person2:Yeah of course ! Although , don ' t you ever wonder what " could have been " ?
Person1: What do you mean ?
Person2:Well , sometimes I think of how things could have turned out if I had done things a little differently .
Person1: For example ?
Person2:Like for example , if I hadn ' t studied architecture , I would have become an artist like I wanted to .
Person1: I see . Yeah now that I think of it , I wouldn ' t have gotten married if I hadn ' t moved to this town and met Sally .
Person2:You see ! Everything happens for a reason ! We wouldn ' t even have met if I hadn ' t been in that car accident ten years ago !
Person1: Well , I have no regrets !
Person2:I ' ll drink to that !
Example Output: informal

Example Input: Person1: I can't finish this steak .
Person2:That's all right .
Example Output:
informal