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:       If I won the Pools , I'd go round the world .  
 Person2:Would you ? I wouldn't .  
 Person1:        What would you do ?  
 Person2:Oh , I don't know . I'd buy a big house with a garden for my wife and kids , I suppose . But it's difficult to imagine having a lot of money .  
 Person1:        One thing's certain . If I had a lot of money , I wouldn't work any more .  
 Person2:Wouldn't you ? What would you do with all that spare time ?  
 Person1:        As I said , I'd go round the world .  
 Person2:What would you do after that ?  
 Person1:        Oh , I don't know . It'd take me a long time to go round the world .  
 Person2:It doesn't sound very exciting .  
 Person1:        Anyway , we haven't won the Pools , and we're not likely to win them . So there isn't much point in talking about it , is there ?  
 Person2:I'd be happy if I got a rise .  
 Person1:        And my wife would be happy if I bought her a mink coat .  
 Person2:Well , I'm not likely to get a rise and you haven't the money for a mink coat , so let's come down to earth and have another drink .  
 Person1:        What'll you have ?  
 Person2:I'll have a pint of the best .  
 Person1:        I'd have a Scotch if I were you . We deserve it .  
 Person2:All right . Make it a double , will you ? 

formal