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. 
 agent: Hello, how may I abet you? 
 customer: Catherine Hall here, please cancel my reservation which I have done previously. 
 agent: Sure, may I know your good name? Thank you for providing your name, please hold on. 
 customer: Sure, I will wait for your response. 
 agent: No reservation found on your name. 
 customer: It's ok, thanks for your information. 
 agent: Thank you for choosing us, have a nice day.
Example Output: no_reservation

Example Input: customer: Hi. 
 agent: Hello, how can I help you? 
 customer: Myself Laura Perez. My kids were bored with their daily schedule, so I want to make their mind refresh. I have decided to take a tour to Washington. Can you please book me a flight ticket on 07/31 along with a return ticket on 08/02? 
 agent: Sure, we are here to help you. Can you share me your journey locations? 
 customer: Thank you. Sure, I will start from LAX and land at IAD. 
 agent: Ok, wait for some time. 
 customer: Ok. 
 agent: We found UA airline with connecting flight and number 1003 fare of 100. Shall I proceed for booking? 
 customer: That's perfect, please proceed. 
 agent: Your ticket has been confirmed. 
 customer: Thank you for your assistance. 
 agent: Thanks for choosing us.
Example Output: book

Example Input: 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.
Example Output:
no_flight