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: Hi. 
 agent: Hello, how may I help you today? 
 customer: Please help me in booking flight ticket from DFW to MCO. 
 agent: Sure, can you please share me with your dates of journey? 
 customer: My trip dates are Sept 18 to Sept 20. 
 agent: Please mention your name? 
 customer: Jonathan Adams here. 
 agent: Are you expecting any other help from my side please? 
 customer: I need a connecting flight. 
 agent: Please wait for a moment. 
 customer: Ok. 
 agent: There is a connecting flight of fare 100 with the Frontier airline, shall I proceed with this booking? 
 customer: Make sure my return should be in the morning. 
 agent: Ok, I have reserved your ticket with the flight number 1013, your depart time is at 5:00 hours and return will be at 9:00 hours. 
 customer: You can book. 
 agent: It has booked successfully. 
 customer: Thank you. 
 agent: You are welcome, have a safe journey.
Output:
book