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 Joshua Phillips.
agent: Hello, how can I assist you?
customer: I have heard that Orlando is the best place for site seeing. So, can you book a flight ticket from Philadelphia, PA - PHL?
agent: Sure, we are here to help you. Can I have the exact airport code of Orlando?
customer: Sure, my destination code is FL - MCO.
agent: How much can you afford for this trip?
customer: I can afford up to 500.
agent: When are you planning to go Orlando?
customer: I want to travel on 07/19.
agent: Ok, do you need a stopover in between your route?
customer: Yes, I need a stopover.
agent: Please help me with your return date.
customer: My arrival date is on 07/21.
agent: Joshua, there is a flight from Frontier airline with fare 100 only. Shall I proceed with the booking?
customer: You may proceed if it is a connecting flight.
agent: Yes, it is a connecting flight.
customer: Thank you for your support, regarding flight booking process.
agent: Your reservation is confirmed with flight number 1005 on your name Joshua Phillips. Thank you for consulting us.
customer: Thank you.
Example Output: book

Example Input: customer: Hello.
agent: Hello. How can I assist you?
customer: I am Nicholas Martinez. I am travelling from Denver-DEN to Philadelphia-PHL to meet my parents.
agent: Sure, can I know the travel dates please?
customer: My departure dates is on 06/08 and return on 06/10.
agent: Ok, wait a moment please.
customer: Ok.
agent: There is a flight in JetBlue airline with price 100, can I book it?
customer: Please proceed for booking.
agent: Your ticket has been booked with flight number 1018.
customer: Thank you for your help.
agent: You are welcome.
Example Output: book

Example Input: customer: Hi.
agent: Hello, how can I assist you?
customer: Could you please check the flight availability in economy class?
agent: Sure, I am here to help you. Please let me know your travelling dates.
customer: My travelling dates are Oct 19 and Oct 21.
agent: Kindly mention your respective airport codes.
customer: My source is SEA and destination is PHX.
agent: Do you prefer any break in between journey?
customer: I need a single connecting flight.
agent: Are there any other specifications for you?
customer: I want to return in the evening.
agent: May I know your good name?
customer: I am David Moore.
agent: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1012. Shall I proceed with this flight?
customer: Ok, proceed.
agent: Your booking is done in United Airlines.
customer: Thank you.
agent: Thank you for availing us.
Example Output:
book