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 have a complaint to make . I've just been badly treated by a rude maid .  
 Person2:Well , we are sorry to hear that.May I have your name and room number ? We will deal with the matter right now .  
 Person1:        Ted.room 2012 .  
 Person2:Mr . Ted , I have to apologize for that and I assure you it won't happy again . 

informal