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: Hi, I am John Phillips. 
 agent: Hello, how can I aid you today? 
 customer: I would like to visit at Washington for enjoying holidays, can you help me to book a flight ticket from LGA to IAD? 
 agent: Sure, we are glad to help you. Can you please share me your travelling dates? 
 customer: I am travelling from July 10 to July 12. 
 agent: Do you prefer any stopover in between journey? 
 customer: Yes, I need a stopover in between my journey. 
 agent: Do you prefer to travel in economy class or business class? 
 customer: I prefer economy class. 
 agent: Is there any airline preferences for you? 
 customer: No, I am comfortable with any airline. 
 agent: Do you have any other requirements to be met? 
 customer: No, thanks for asking. 
 agent: Ok, please wait for a while. I will revert you with the best flight. 
 customer: Sure, take your time. 
 agent: Thanks for waiting, there is a flight found in Hawaiian airline with a fare of 100 and the flight number is 1016. Shall I proceed for booking? 
 customer: Please proceed. 
 agent: Ok, your ticket is reserved in economy class. 
 customer: Thank you. 
 agent: Thank you for choosing us.
Example Output: book

Example Input: customer: Hello. 
 agent: Hello, how may I assist you today? 
 customer: I want to change my existing reservation due to my board exams. Can you help me for that one/. 
 agent: Sure, I am here to help you. May I know your name please? 
 customer: Sure, my name is Nicolas Edwards. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Sorry to inform you that there is no active reservation found on your given name. 
 customer: No issues, thank you for the information. 
 agent: Thanks for contacting us.
Example Output: no_reservation

Example Input: customer: Hello. 
 agent: Hello. How can I aid you today? 
 customer: Can you aid me in booking a flight ticket from ORD to LGA? 
 agent: Sure, I am here to help you. 
 customer: Thank you. 
 agent: May I know your travel dates please? 
 customer: I am planning to start on Sep 24th and return back on Sep 26th. 
 agent: Ok, do you have any specifications? 
 customer: Make sure that connection limit is 1. 
 agent: Ok, hold on for a moment. Let me check the best available flight for you. 
 customer: Take your time. 
 agent: I found a flight for you with Frontier Airlines and it costs you 300. Shall I proceed? 
 customer: Book it on the name Dennis Allen. 
 agent: Your ticket has been booked with 1013 flight number. 
 customer: Thank you for the support. 
 agent: Welcome, thank you for choosing us. Have a great day.
Example Output:
book