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, I am Nancy Miller. 
 agent: Hello, how may I support you? 
 customer: After completion of Inauguration day in New York, I am planning to visit Minneapolis & St. Paul. Can you please book me a ticket with fare of 200? 
 agent: Sure, We are happy to help you. Can you please share your travel dates? 
 customer: I would like to start on 01/21 and return on 01/23. 
 agent: May I know your connection limit? 
 customer: I need single connection. 
 agent: Please provide your airport codes? 
 customer: My airport codes are from NY-JFK to MN-MSP. 
 agent: Ok, please give me a moment. 
 customer: Sure. 
 agent: Thanks for your valuable time. We found a flight with Frontier airlines and flight number is 1026. Fare is 200 having a connection. Shall I book this ticket? 
 customer: That's Frontier airline is perfect for me, you can proceed for booking. 
 agent: Your ticket has been confirmed. 
 customer: Thanks for your help. 
 agent: Thank you for opting our service. Wish you a happy journey.
Output:
book