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:       Good morning , madam . What can I do for you ? !  
 Person2:I'd like a coffee please .  
 Person1:        Certainly , madam . What kind of coffee would you like ?  
 Person2:What have you got ?  
 Person1:        Well , we have espresso , cappuccino , latte , skinny latte and Americano .  
 Person2:Goodness me ! So many choices ! I think I'll have a cappuccino please .  
 Person1:        Here you are . You'll find the sugar just over there . 

informal