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: Hello, how can I help you today? 
 customer: Emily Anderson here. I would like to travel from EWR to meet my brother who was staying in BOS, can you help me to find a flight? 
 agent: Sure, we are here to help you. Can you share me your travelling dates? 
 customer: Thank you. My travelling dates are Nov, 22 and Nov, 24. 
 agent: Do you need any halt in between your journey? 
 customer: Yes, I need a halt between journey. 
 agent: Ok, wait for some time I will check and get back to you. 
 customer: Sure. 
 agent: Thanks for waiting there are no flights found on your details. 
 customer: That's fine, thanks for your information. 
 agent: Thanks for approaching us.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello, what can I do for you at this time? 
 customer:  I am Kimberly Hill. I want to book a ticket to NY-LGA from TX-AUS. 
 agent: Sure, can I know your dates? 
 customer: My travelling dates are 09/23 and 09/25. 
 agent: Just hold on for a moment. 
 customer: Ok. 
 agent: Sorry for the inconvenience, there is no flight available on your dates. 
 customer: Ok, thank you for you response. 
 agent: Thank you for opting us.

Output: no_flight


Input: Consider Input: customer: Hi. 
 agent: Hello. 
 customer: I am Paul Green. 
 agent: Yes sir, in which way I can assist you at this moment? 
 customer:  I have an important meeting in MCO which is conducting by our CEO to discuss about the performance for the individuals and distributing the awards for the top performers and they are offering a ticket budget of 500, can you please help me in flight ticket booking from EWR with a non connecting flight? 
 agent: Sure, I am mirthful to help you with that. 
 customer: Thank you for considering my request. 
 agent: Please provide your itinerary departure and return dates of travelling. 
 customer: Sure, my itinerary dates are 01/14 and back to my home town on 01/16. 
 agent: Please wait for a couple of minutes I will be back with a best flight in your route. 
 customer: Sure and find the flight as soon as possible that I am in busy work. 
 agent: Yes sir, there is a non connecting flight in your journey and the details are flight number 1017 having with the fare of 200 provided by Southwest airlines. Are you ok with this? 
 customer: That's perfect, you can confirm my flight ticket booking. 
 agent: Sure sir, I have confirmed your ticket successfully. 
 customer: Thank you for your immediate help in my flight ticket booking. 
 agent: Thank you for reaching us, hope you have a great journey. 
 customer: Welcome.
Output: book