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 may I aid you today? 
 customer: Can you please check for the flights on the route from BOS to DEN? 
 agent: Sure, can you please provide your departure and arrival dates? 
 customer: My journey dates are from Oct 20 to Oct 22. 
 agent: Are you looking for any preferred class? 
 customer: Any class will be ok but my depart time will be in afternoon. 
 agent: Do you have any other specifications to be met? 
 customer: I need 1 connection flight. 
 agent: Kindly mention your name? 
 customer: Myself Mark Phillips. 
 agent: We have found a connected flight of United airlines, flight number-1018 class-economy depart time-afternoon 15:00 PM and fare is 200. 
 customer: Please book it. 
 agent: Sure, your ticket has been booked. 
 customer: Thank you for helping me.

Ex Output:
book


Ex Input:
customer: Hi. 
 agent: Hello, how may I lend a hand to? 
 customer: I need to change my existing reservation as my trip got postponed, Can you please help me with that? 
 agent: Sure, I am here to help you for this. Could you please mention your name? 
 customer: Kevin Williams here. 
 agent: Please wait for a while, let me check your reservation status in our records. 
 customer: Sure. 
 agent: Sorry for inconvenience, no reservation is found with your criteria. 
 customer: Ok, no problem. Thanks for your information. 
 agent: Thank you very much for contacting our agency.

Ex Output:
no_reservation


Ex Input:
customer: Hi. I am Anthony Smith. 
 agent: Hello, how can I render you today? 
 customer: I want to cancel my reservation, because I would like to travel in The Queen Mary Ship to reach my destination. Can you please help me out? 
 agent: Sure, we are here to help you. Wait for a while. 
 customer: Ok. 
 agent: Thanks for waiting there is no reservations found on your name. 
 customer: Ok, no problem. Thank you. 
 agent: Thanks for approaching us.

Ex Output:
no_reservation