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:       We're lucky today .  
 Person2:Yes , there aren't any clouds in the sky and we've got such a beautiful view here . Look ! This is St James Park . And there's Buckingham Palace  
 Person1:        Where's Hyde Park ?  
 Person2:It's on the other side of the Palace .  
 Person1:        That's the place where people make speeches on Sundays , isn't it ?  
 Person2:Yes , you're right . Politicians of all kinds , religious people , and one or two madmen .  
 Person1:        Well , are we going there today ? I want to take shots there .  
 Person2:Sure . I can see you're enjoying your trip today .  
 Person1:        Of course . Everything's so striking and fascinating . 

informal