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

Input: Consider Input: customer: Hello. 
 agent: Hi. How can I help you? 
 customer: Myself Stephen Parker. I want to travel from DEN to JFK, can you please book a flight ticket for me? 
 agent: Sure, may I know your date please? 
 customer: I want to travel from 06/10 to 06/12 dates. 
 agent: Hawaiian airlines is matching you with 1029 flight number, can I proceed for booking? 
 customer: Sure, please proceed it. 
 agent: Your booking is confirmed. 
 customer: Thank you so much. 
 agent: Thank you, have a safe journey.

Output: book


Input: Consider Input: 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.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello. 
 customer: I am Kenneth Carter. 
 agent: How may I be at your service, Kenneth Carter? 
 customer: I want to meet my grandparents who are staying at New York, EWR. 
 agent: Ok. 
 customer: Can you help me in booking a flight ticket on 12/04? 
 agent: Sure, I am perky to help you. On which date you want to return? 
 customer: I will be return on 12/06. 
 agent: What is your source point? 
 customer: I am boarding at Washington, IAD. 
 agent: Are you having any preferences? 
 customer: I need 1 connecting flight. 
 agent: Ok, please hold on. Thanks for waiting. 
 customer: Ok. 
 agent: You have 1029 flight with 1 connection of price 100 in Southwest airline. 
 customer: Ok, You can proceed. 
 agent: Ticket has been reserved with your name. 
 customer: Thanks for your assistance. 
 agent: Thank you for availing us.
Output: book