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:       Could I see the manager please ? I have a complaint to make .  
 Person2:Yes , I ’ m the manager here . What can I do for you , Madam ?  
 Person1:        Did you have the room checked before we move in ?  
 Person2:Which room are you in ?  
 Person1:        1808 . The toilet doesn ’ t work properly . The water doesn ’ t run in the shower .  
 Person2:I ’ m awfully sorry to hear that . ( After checking ) I ’ ll turn to it right away . I do apologize . We ’ ll change your room to 2002 .  
 Person1:        That ’ s not bad . Thanks for your help .  
 Person2:It ’ s my pleasure , Madam . 

informal