Detailed Instructions: 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
Problem:customer: Hello. 
 agent: Hello, How exactly I can serve you the best today? 
 customer: I am Katherine Anderson. Can you help me booking a flight ticket from LAX to PHL? 
 agent: Can you please share your travel dates that you have planned? 
 customer: I will start on Nov, 19 and return on Nov, 21. 
 agent: Ok, Do you like to go with a connecting or direct flight? 
 customer: I need a break in my journey. 
 agent: Ok, please wait a moment. let me search a flight for you. 
 customer: Sure. 
 agent: We have found a direct flight with AA airlines, flight number 1008 and the fare of 100. Shall I reserve a ticket for this airline? 
 customer: Please proceed with the booking. 
 agent: Sure, your ticket has been reserved. 
 customer: Thank you. 
 agent: Thanks for approaching us, wish you a great journey.
Solution:
book