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:       Room reservations . Can I help you ?  
 Person2:Hello , is there a room available ?  
 Person1:        What kind of room do you have in mind ?  
 Person2:A twin room , please .  
 Person1:        Hold on , please . ... I'm afraid we're fully booked.The only room available at the moment is a suite .  
 Person2:Oh , I see . Thank you anyway . 

formal