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? 
 customer: I am planning to book a ticket from EWR to DEN. Can you please help me out? 
 agent: Sure, may I know your planned trip dates? 
 customer: I am planning to travel on July 10 and return back on July 12. 
 agent: Do you have any other requirements? 
 customer: I am looking for a connecting flight. 
 agent: Can you please share me your name? 
 customer: My name is Edwards Thomas. 
 agent: We are sorry to inform you that there is no flight found with your given information. 
 customer: That's fine, thank you for your service. 
 agent: Thank you.
Example Output: no_flight

Example Input: customer: Hello. 
 agent: Hello. 
 customer: Myself Ryan Williams. 
 agent: How may I assist you Ryan Williams? 
 customer: I am planning to visit Disney Land with my friends in LAX. Can you book a ticket from LGA? 
 agent: That's great, may I know your journey dates please? 
 customer: My planning dates are from 10/01 to 10/03. 
 agent: Wait a moment please. 
 customer: Ok. 
 agent: Sorry to say, as there is no flight available on your provided dates. 
 customer: It's fine. 
 agent: Is anything else I may assist you? 
 customer: Thank you for your response. No. 
 agent: Ok, thank you for contacting us. 
 customer: You are welcome.
Example Output:
no_flight