You will be given a definition of a task first, then some input of the task.
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

customer: Hello. 
 agent: Hello. How can I assist you today? 
 customer: I want to travel from MSP to ORD. Can you help me to book a flight ticket? 
 agent: Please can I know your dates of journey to book? 
 customer: I want to fly in the flight on Nov 03 and Nov 05. 
 agent: Ok, please let me know your specifications. 
 customer: I prefer to travel in economy class. 
 agent: There is a flight ticket available for a connecting flight for the airfare 200. Can I book a flight 1023? 
 customer: Proceed to booking. 
 agent: Ok, please let me know your name to proceed. 
 customer: I am Jason Wright. 
 agent: The flight ticket is been confirmed and the airlines s Hawaiian. Thank you for choosing our agency. 
 customer: Thank you for your help.
Output:
book