Definition: 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'.
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 . 

informal