Teacher:In this task, you are given a conversation between a flight agent and the customer. You are given 4 options and you need to select the goal of the conversation. It is provided as part of customer's context, which has to be one of the following: `book`: Make a new reservation, `cancel`: Cancel an existing reservation, `no_flight`: No flight found for the customer's preference, `no_reservation`: No reservation / No change / No cancellation was made in the conversation, mostly enquiring details
Teacher: Now, understand the problem? Solve this instance: customer: Hello. 
 agent: Hello. 
 customer: I am Mary Adams. 
 agent: How can I aid you for the day? 
 customer: I have to attend a Music Concert at Detroit, could you please help me with booking a flight ticket from IAD to DTW? 
 agent: Sure, I will help you with that flight ticket booking. May I know your planned trip dates? 
 customer: I would like to take off on 03/08 and return on 03/10. 
 agent: There is a flight in Hawaiian airline with connection 1 and the fare is 100. Shall I proceed? 
 customer: Please confirm the booking. 
 agent: Mary Adams, your booking is confirmed with 1024 flight. 
 customer: I really appreciate your help, thank you for your service. 
 agent: Thank you for approaching us, have a safe journey.
Student:
book