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

[Q]: customer: Hello, I am Ryan Anderson. 
 agent: Hello, how may I aid you at this moment? 
 customer: I would like to go to a beach in Washington, so could you please book a ticket for me? 
 agent: Can I have your journey dates? 
 customer: I would like to go on 02/03 and return back on 02/05. 
 agent: Please send your nearby airport codes. 
 customer: My airport codes are PHX and DCA. 
 agent: Please wait for a moment. 
 customer: Ok, ensure it is a single connecting flight. 
 agent: Sorry, no flights are running on those dates. 
 customer: That's ok, thank you for checking. 
 agent: Thank you for reaching us. 
 customer: Welcome.
[A]: no_flight


[Q]: customer: Hi. 
 agent: Hello, how may I help you today? 
 customer: I want to cancel my recent reservation owing to an emergency. 
 agent: Sure, may I know your good name? 
 customer: My name is Richard Campbell. 
 agent: I have checked in reservation list to cancel your ticket, but could not find any reservation with your name. 
 customer: Thank you. 
 agent: Thank you for opting us.
[A]: no_reservation


[Q]: customer: Hi. 
 agent: Hello. How can I assist you? 
 customer: I am Emma Young. I am planning to book a ticket from CLT to DFW. Can you please help me out? 
 agent: Ok, may I know your travelling dates? 
 customer: I would like to travel on Mar 10 and return back on Mar 12. 
 agent: Here is a connecting flight with flight number 1029 and fare is 100, providing ticket in economy class. Shall I proceed with booking? 
 customer: That's fine, please proceed the booking. 
 agent: Your booking is done in Spirit airlines. 
 customer: Thank you for your service. 
 agent: Thank you for choosing us.
[A]:
book