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 may I help you today? 
 customer: Can you please help me in booking the ticket from SFO to LAS? As I have a plan to participate in a dance competition. 
 agent: Sure, can you please mention with your dates of journey? 
 customer: Sure, my planned departure and return travel dates are 11th and 13th of April. 
 agent: May I know your name please? 
 customer: My name is Scott Carter. 
 agent: Do you have any other requirements please? 
 customer: Yes, my maximum connection has to be 1. 
 agent: Please wait for a moment. 
 customer: Sure. 
 agent: I found a flight with the connecting flight of fare 200 with the UA airline, shall I proceed with this booking? 
 customer: That's fine for me, you can proceed for booking the ticket. 
 agent: Ok, I have reserved your ticket with the flight number 1019, your depart time is at 13:00PM and return will be at 1:00AM. 
 customer: Thank you so much for your help. 
 agent: You are welcome, have a safe journey.
Output:
book