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: Hello.
agent: Hello, how may I help you?
customer: Myself Mark Brown here. I need to fly Las Vegas for my college admission, could you please help me in booking my flight ticket from ATL to LAS?
agent: Sure, can you please let me know your journey dates that you wish to travel?
customer: My travel dates are 11/11 and 11/13.
agent: Do you need a flag stop in between your journey?
customer: I need a connecting flight.
agent: May I know how much do you want to spend on flight ticket?
customer: I can spend upto 500.
agent: Please wait for a while.
customer: OK.
agent: We found a flight in Southwest airlines, flight number is 1005 with one connection price is 100. Shall I proceed?
customer: Ok, you can proceed.
agent: Ok, your ticket has been confirmed in economy class.
customer: Thank you for booking.
agent: Thank you for opting us.
Example Output: book

Example Input: customer: Hello. I am Susan Jackson.
agent: Hello, how can I provide assistance for you?
customer: As I am racer, I want to attend for horse racing festival which is going to held at San Francisco, SFO.
agent: Ok.
customer: Can you please book a ticket from New York, LGA?
agent: Sure, I am perky to help you.
customer: Thank you.
agent: Let me know, when you are planning to depart?
customer: I want to start my journey on 10/16.
agent: Do you need a lay by in between your journey?
customer: I need a connecting flight.
agent: Kindly, share your return date of journey to proceed further.
customer: I will return back on 10/18.
agent: Thank you for sharing your details. Please, wait for a while.
customer: Sure.
agent: Thank you for being patience, there is a flight available in Southwest airline, flight number 1001 having fare 200 and a lay by.
customer: You can proceed.
agent: Your reservation has been processed.
customer: Thank you.
agent: Thank you for availing us.
Example Output: book

Example Input: customer: Hello.
agent: Hello. How may I help you?
customer: I want to travel from PHL to MCO. Please help me in booking my ticket.
agent: Sure, I am happy to help you. Can you please provide me your travel dates?
customer: Thank you and my travelling dates are from 06/14 to 06/16.
agent: Ok, do you have any preferences?
customer: I need a connecting flight and I am looking for economy class as well.
agent: May I know your name?
customer: My name is Ryan White.
agent: Ok, please wait for a while.
customer: Sure.
agent: Flight-1004 is available as per your requirements and the ticket fare is 100 only. Can I book the ticket for you?
customer: Please book this ticket for me.
agent: Your ticket is booked in economy class with the flight-1004.
customer: Thank you for your help.
agent: You are welcome and thank you for choosing us.
Example Output:
book