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

[EX Q]: customer: Hello. 
 agent: Hello, how may I best assist you now? 
 customer: I am Donna Young and I want to cancel my reservation, as I am not feeling good. Will you aid me in this? 
 agent: Sure, please wait a moment. 
 customer: Thank you. 
 agent: There is a reservation found on your name, shall I proceed for cancellation? 
 customer: Yes, please. 
 agent: Your ticket has been cancelled. 
 customer: Thank you for your support. 
 agent: Thanks for communicating us and have a good day.
[EX A]: cancel

[EX Q]: customer: Hi. 
 agent: Hello, how may I aid you? 
 customer: I am Stephen Young. I am planning to visit some new places at Orlando, help me in booking my flight ticket with one halt. 
 agent: Sure, can you please share your travelling dates? 
 customer: My travelling dates will be 12/26 to 12/28. 
 agent: May I know your airport codes? 
 customer: I would like to start my journey from TX-DFW. My landing airport will be FL-MCO. 
 agent: Thanks for providing your details. Unfortunately there are no flights found with your requirements. 
 customer: Its ok, thank you for your assistance. 
 agent: Thank you for choosing us.
[EX A]: no_flight

[EX Q]: customer: Hello. 
 agent: Hello. 
 customer: My name is Joseph Nelson. 
 agent: How may I help you? 
 customer: Due to sudden change in my plan, I would like to change my existing reservation. Can you help me in changing my reservation? 
 agent: Sure, please wait a moment. 
 customer: Sure. 
 agent: Nelson, there is no reservation has been found on your name in our database. 
 customer: Ok, that's fine. Anyways, thank you for the information. 
 agent: Thank you for approaching us. 
 customer: Welcome.
[EX A]:
no_reservation