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 assist you today? 
 customer: I want to attend a Seminar in Washington. Can you please help me for booking the flight ticket? 
 agent: Sure, Can you please provide your take off and landing airport codes? 
 customer: My airport codes are LAS and IAD. 
 agent: On which dates would you like me to book a flight ticket for you? 
 customer: My travelling dates are June 17 and June 19. 
 agent: On what name, do I need to reserve your ticket? 
 customer: Ashley Walker. 
 agent: Let me know your connection limit? 
 customer: I prefer single connecting flight. 
 agent: Do you have any other requirements? 
 customer: No. 
 agent: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions. 
 customer: Anyway, thanks for the information. 
 agent: Thank you for choosing us.

Output: no_flight


Input: Consider Input: customer: Hi. This is Michelle Clark, from Dallas. 
 agent: Hello, How may I assist you? 
 customer: Recently I made a reservation and now the trip has been postponed due to some issues. Can you help me in changing my ticket? 
 agent: Sure, I can help you. 
 customer: Thank you. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Thanks for your time, there is no reservation found in your name. 
 customer: That's ok, not an issue. Thanks for your effort. 
 agent: Thank you for choosing us.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I help you at this moment? 
 customer: I want to attend a Marriage in Chicago. Can you please help me for booking the flight ticket? 
 agent: Sure, Let me know your boarding point. 
 customer: My boarding point is SEA. 
 agent: Can you please share your depart and arrival dates? 
 customer: My travelling dates are July 07 and July 09. 
 agent: Ok, May I know your connection limit? 
 customer: I prefer single connecting flight. 
 agent: Is there any other preferences? 
 customer: No, I don't have any other preferences. 
 agent: To proceed further, may I know your name please? 
 customer: My name is Emma Perez. 
 agent: We are happy to inform you that, we found a direct flight in 1022 Spirit Airline with a fare of 200. Can I proceed for booking? 
 customer: Please proceed for booking the flight ticket. 
 agent: Sure, your ticket has been reserved. 
 customer: Thanks for helping me. 
 agent: Thank you for approaching us.
Output: book