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

Ex Input:
customer: Hello. 
 agent: Hello. How can I assist you at this moment? 
 customer: I am Pamela Walker here. I am planning to visit a Houston city to meet my grandfather in IAH from LAS. Can you find a flight ticket for me? 
 agent: Sure Pamela Walker, I will help you with that. Can I have your travel dates please? 
 customer: Ok, my preferable dates are on 12/19 and back on 12/21. 
 agent: Ok Pamela Walker, please wait a moment to check flight availability. 
 customer: Sure. 
 agent: AA airlines running a flight in your route with connection 1 and the fare of the ticket is 200. Shall I proceed with booking? 
 customer: Yes, you can reserve the ticket. 
 agent: Ok Pamela Walker, your ticket booking has done and the flight number is 1021. 
 customer: Thank you for spending your time. 
 agent: Thank you for choosing us, have a great journey.

Ex Output:
book


Ex Input:
customer: Hello. 
 agent: Hello. How can I help you today? 
 customer: My name is Matthew Harris, I want to book a flight from LAS to visit my home at Houston. Can you book a flight for me? 
 agent: Sure, we are gleeful to help you. Can you please share your trip dates? 
 customer: I will fly on Jan 5th and return on Jan 7th. 
 agent: May I know your destination airport code please? 
 customer: My destination point is IAH. 
 agent: Do you have any halt in between journey? 
 customer: Yes, I need a halt. 
 agent: Is there any other specifications? 
 customer: No. 
 agent: Thanks for providing details, we found a connecting flight with AA airline in business class and the flight number is 1008. Is it ok for you? 
 customer: Yes, please proceed with booking. 
 agent: Ok, your ticket is reserved with a fare of 100. 
 customer: Thank you for helping me. 
 agent: Thank you for choosing us.

Ex Output:
book


Ex Input:
customer: Hello,. I am Anthony Mitchell. 
 agent: Hello, How may I help you? 
 customer: Can you help me in booking my flight ticket to Seattle SEA to visit Columbia centre? 
 agent: Sure, We are here to help you. May I know the source code? 
 customer: I will start my travel from Austin, AUS. 
 agent: Please help me with your travel dates. 
 customer: Make sure that I need a direct flight to SEA. Dates of my travel are 09/15 - 09/17. 
 agent: Please wait a minute. 
 customer: Sure. 
 agent: Sorry, No flights found with your chosen dates. 
 customer: Ok, I will look for other alternative. Thank you for assisting me. 
 agent: Thank you for availing us.

Ex Output:
no_flight