Q: 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 would like to travel from IAD to MCO as a holiday trip. Can you do the reservation? 
 agent: Sure, will you mention your travelling dates please? 
 customer: My journey dates are 05/06 and 05/08. 
 agent: Do you have any preferences about class? 
 customer: I am comfortable with any class. 
 agent: Do you have any preferences about flight connections? 
 customer: I need break in my journey. 
 agent: Please mention your name. 
 customer: Katherine Clark here. 
 agent: The Frontier airlines providing an economy class flight with price 200 and the connections 1. Shall I confirm your ticket? 
 customer: Please do the booking. 
 agent: Your ticket is booked. The flight number is 1021. 
 customer: Thank you. 
 agent: Welcome, have a great day.
A:
book