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. I am Anna Lewis.
agent: Hello, how can I assist you?
customer: I want to book a flight ticket to participate in a cultural fest at IL-ORD on 09/07. Can you help me?
agent: Sure, please provide your return journey date.
customer: 09/09 will be my return.
agent: Please share your origin airport code.
customer: NV-LAS will be my origin.
agent: Please share your specifications.
customer: I need a connecting flight.
agent: Unfortunately, there is no flights based on your details.
customer: No issue. Thank you.
agent: Thank you for choosing us.
Example Output: no_flight

Example Input: customer: Hello.
agent: Hello.
customer: I am Brenda Gonzalez.
agent: How may I assist you at this moment?
customer: Owing to an emergency, I want to cancel my recent reservation. Can you help me out?
agent: Sure, I am glad to help you with that. Please be on hold to check your previous reservation.
customer: Ok, take your time.
agent: As per your request, I have successfully cancelled your reservation.
customer: Thank you for your help.
agent: Thank you for approaching us, have a great day.
Example Output: cancel

Example Input: customer: Hello.
agent: Hello, how may I help you?
customer: Can you please help me to change my existing reservation as I have changed my trip plan?
agent: Sure, I am here to help you for this. May I know your name please?
customer: My name is Justin Martinez.
agent: Please wait for a while, let me check your reservation status in our records.
customer: Ok.
agent: Sorry to intimate that, no reservation is found with your credentials.
customer: No problem, thank you for your information.
agent: Thank you very much for contacting our agency.
Example Output:
no_reservation