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:       I am looking for a comfortable convenient way to see the country .  
 Person2:Have you heard of motor coaching ? It's one of the fastest-growing segments for the travel industry .  
 Person1:        No , I've not heard of it . Tell me about it .  
 Person2:It's almost like going on an ocean cruise except that you go by land . Everything is planned for you from the moment you step on board a luxury coach .  
 Person1:        Is it just a bus ?  
 Person2:Oh . no . The motor coach is air-conditioned , there is a galley for food preparation , movies or music are available for your entertainment and attendants are there to take care of your every need .  
 Person1:        Wow ! That sounds like pure luxury . 

informal