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

Example Input: customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: I want to travel from HOU to AUS. Can you please help me for booking? 
 agent: Sure, I will help you. Your good name please? 
 customer: Sure, my name is James Carter. 
 agent: Could you please share your planned journey dates? 
 customer: My planned journey dates are 10 and 12 on the month of March. 
 agent: Let me know your connection limit. 
 customer: I need a connected flight. 
 agent: Which class would you prefer for your journey? 
 customer: I am fine with any class. 
 agent: Do you have any other preferences? 
 customer: My depart time is evening. 
 agent: Give me a minute, I will let you know the flight availability. 
 customer: Sure. 
 agent: Thank you for your time, there were no flights available that matches your requirements. 
 customer: Ok, thanks for your assistance. 
 agent: Thank you for approaching us.
Example Output: no_flight

Example Input: customer: Hi. 
 agent: Hello, how may I support you? 
 customer: Actually I have planned a trip to enjoy my weekend. But, unfortunately I have met with illness. So, I need to cancel my ticket. Can you help me with cancellation? 
 agent: Sure, I will help you. Can I have your name please? 
 customer: Donna Phillips, is my name. 
 agent: Ok, just a moment. 
 customer: Sure. 
 agent: Thanks for your time, no reservation was found based on your good name. 
 customer:  Ok, not a problem. Thanks for your kind information. 
 agent: Thank you for selecting us.
Example Output: no_reservation

Example Input: customer: Hello, I am Joseph Williams. 
 agent: Hello, how can I retrofit you? 
 customer: I planned to visit Botanic garden with my husband at Dallas & Fort worth. Could you please help me with reserving a plane ticket? 
 agent: That's great to hear, I can certainly help you with that. May I know where is Botanic garden located? 
 customer: Thank you, It is in Dallas & Fort Worth behind the airport DFW. 
 agent: Ok, do you need any way station in between the journey points? 
 customer: Yes, I need a break in between the journey because it gives me more refreshment. 
 agent: Could you please let me know  when are you planning to make your journey possible? 
 customer: I have planned to start on 07/22 and return on 07/24 from the Botanical garden. 
 agent: Ok, how much fare are you expecting for your ticket? 
 customer: I can pay up to 200. 
 agent: Ok, let me check the availability and revert you. 
 customer: Sure, I will be waiting for your response which makes me happy. 
 agent: Thanks for being patience, There is a airline available on your requested dates. 
 customer: May I know the airline details? 
 agent: The flight details are flight name: Spirit and flight number: 1022. The amount to be paid for your ticket is 100. 
 customer: I am happy with this airline, please continue with booking. 
 agent: Ok, let me save your details. We have booked  a flight that will fit your schedule dates. The tickets will arrive you by mail in few hours. 
 customer: Thank you for reserving a ticket in best airline. 
 agent: Thank you for approaching us, we will be there to serve you at any time again. 
 customer: Ok, I appreciate your service. I will refer my friend in future to consult you.
Example Output:
book