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:       Where to , miss ? 
 Person2:Hi ! Crenshaw and Hawthorne , at the Holiday Inn that is on that corner . 
 Person1:        Sure thing . So , where are you flying in from ? 
 Person2:From China . 
 Person1:        Really ? You don ’ t look very Chinese to me , if you don ’ t mind me saying so . 
 Person2:It ’ s fine . I am actually from Mexico . I was in China on a business trip , visiting some local companies that manufacture bathroom products . 
 Person1:        Wow sounds interesting ! Excuse me if I am being a bit nosy but , how old are you ? 
 Person2:Don ’ t you know it ’ s rude to ask a lady her age ? 
 Person1:        Don ’ t get me wrong ! It ’ s just that you seem so young and already doing business overseas ! 
 Person2:Well thank you ! In that case , I am 26 years old , and what about yourself ? 
 Person1:        I am 40 years old and was born and raised here in the good old U . S of A , although I have some Colombian heritage . 
 Person2:Really ? That ’ s great ! Do you speak some Spanish ? 
 Person1:        Uh ... yeah .. of course ! 

informal