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

customer: Hello, I am Alexander Anderson.
agent: Hello, How exactly I can serve you the best today?
customer: Please book a ticket to TX - AUS, Austin, with a connecting flight. As I need to attend citizenship day celebration with my neighbours.
agent: Sure, we are perky to serve you.
customer: Thank you.
agent: Can you please provide your take off airport code?
customer: Seattle, WA - SEA.
agent: Could you let me know when you are willing to travel?
customer: On 12/28, I will start.
agent: Let me know your return date?
customer: And I will return on 12/30.
agent: Ok, wait for a while I will check the availability of flights and revert you.
customer: Sure.
agent: Thanks for your precious time. We found AA airline fare of 100. Shall I proceed for booking with single stop over flight?
customer: Yes, please proceed for booking.
agent: Your ticket has been reserved with flight number 1025.
customer: Thank you for your service.
agent: Thank you for availing us, Have a safe journey!.
book