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

Input: Consider Input: customer: Hello.
agent: Hello, how can I guide you for today?
customer: Can you help me to book a business class flight ticket?
agent: Can you please share on what dates you are willing to travel?
customer: My travel dates are May 05 and May 07.
agent: Can you please provide your source and destination airport codes?
customer: My airport codes are DEN and MSP.
agent: Do you have any airline preferences?
customer: I am comfortable with any airlines.
agent: Are you looking for a connecting flight or direct flight?
customer: I am looking for connecting flight.
agent: Do you have any other requirements that you are looking for?
customer: No, thanks for asking.
agent: Can you please provide your name to proceed further?
customer: My name is Thomas Scott.
agent: Sorry, there are no flights available at your request.
customer: No problem, thank you for the information.
agent: Thank you for contacting us, have a nice day.

Output: no_flight

Input: Consider Input: customer: Hello.
agent: Hello.
customer: I am Barbara Green.
agent: How can I assist you?
customer: I am very interested in Hiking and cycling. So, I am willing to visit Hiking and cycling at Bear Mountains. Can you please help me to reserve a flight ticket for me from PHX to LAX?
agent: Sure, may I know your preferred journey dates?
customer: Sure, I have planned my journey dates on 02/03 and I will catch the return flight on 02/05.
agent: Please give me a minute.
customer: Sure, take your own time.
agent: I found a flight for you in UA airlines with price 200. Shall I book the ticket for you?
customer: I am ok with the flight that you have provided to my journey. Continue with flight ticket booking.
agent: Your ticket is confirmed and the flight number is 1002.
customer: Thank you for your help in my flight ticket booking.
agent: Thank you for contacting us, have a safe journey.
customer: You are welcome.

Output: book

Input: Consider Input: customer: Hello. Donald Lopez here.
agent: Hello, how can I be in your service?
customer: I wan to attend a Seminar in Washington. Can you please help me for booking the flight ticket?
agent: Ok, I will be glad to assist you with that. May I know the airport codes to check?
customer: My airport codes are from LGA to DCA.
agent: Ok, please can you let me know your travel dates too?
customer: My travelling dates are from 09/15 to 09/17.
agent: Ok, please wait a moment.
customer: Make sure my connections limit is 1.
agent: Ok, I will check.
customer: Ok.
agent: Thank you for waiting, there is a flight with airfare 100 and the airlines is JetBlue. Can I book it?
customer: Please proceed for booking the flight ticket.
agent: Ok, the flight is been booked with 1 connecting flight limit as you needed.
customer: Thanks for helping me.
agent: Thank you for choosing our agency.
Output: book