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:       Excuse me . Do you happen to have a gym here ? 
 Person2:Yes , sir . I think you'll find our gym quite satisfactory . 
 Person1:        So , where do I go to exercise ? 
 Person2:It's only one flight down , sir . Just take the elevator or the stairs . 
 Person1:        Am I going to be charged extra for using the gym ? 
 Person2:Sir , you can use the gym for free . All you need is your room key . 
 Person1:        Great ! Now tell me , what are the hours of this gym ? 
 Person2:Sir , our gym is open around the clock , every day of the week . 
 Person1:        Okay . Do you have a trainer to help me work out ? 
 Person2:I'm sorry , sir , but we have no trainer . 

formal