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 may I assist you today? 
 customer: I am Raymond White, I want to change my reservation as my plan to meet my friend is postponed due to my bad health. Can you help me to change my reservation. 
 agent: Sure, I am here to help you. Ok, please wait a moment. 
 customer: Sure. 
 agent: Thanks for waiting. Sorry, there is no reservation found on your name. 
 customer: Ok, thank you for the information. 
 agent: Thank you for opting us.

Output: no_reservation


Input: Consider Input: customer: Hi. Dennis Hall here. 
 agent: Hello. How can I help you? 
 customer: Reserve a flight ticket that is from SEA to CLT. 
 agent: Can you please tell your travelling dates? 
 customer: My travel dates are from 03/18 to 03/20. 
 agent: Sorry, there are no flights available with your requested details. 
 customer: Ok, not a problem. Thank you. 
 agent: Thank you and have a nice day.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello, how can I guide you today? 
 customer: Can you please help me with booking a flight ticket from DTW to LAS? 
 agent: Can you please share your travelling dates? 
 customer: My travelling dates are from Sept 09-11. 
 agent: Do you have class preference? 
 customer: I am comfortable with any class. 
 agent: Do you need connection limit? 
 customer: I would be comfortable with single stop over. 
 agent: May I know your name? 
 customer: Stephanie Carter here. 
 agent: We found Spirit Airline with fare 400 and flight number is 1011 with connecting flight. Shall I proceed with the booking? 
 customer: You can proceed with booking. 
 agent: Your booking is done. 
 customer: Thank you for the help. 
 agent: Thank you for choosing us.
Output: book