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:       Espresso is made with a machine that forces steam and boiling water through finely ground coffee . It's strong .  
 Person2:OK , OK , this is good . Keep talking . What about cappuccino and all those other drinks ?  
 Person1:        Cappuccino is one-third espresso and two-thirds a mixture of steamed milk and froth .  
 Person2:Froth ?  
 Person1:        If you want something manly , stick with the espresso .  
 Person2:Thanks , Hugh . I owe you one . 

formal