Teacher: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'.
Teacher: Now, understand the problem? Solve this instance: Person1: What'll it be today , sir ?
Person2:Fill it up . Super Unleaded .
Person1: Shall we check your oil and tires ?
Person2:I just checked the oil myself , but you can check the tires .
Person1: ( The attendants fill the tank , clean the windscreen , and add some air to the tires . ) All right , sir , that'll be $ 26.50 .
Person2:I'll charge it . Here's my card .
Student:
formal