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.
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.
agent: Hello, how can I assist you today?
customer: I am Brian Hernandez, want to change my existing reservation, because my interview got postponed to other dates. Can you help me in this?
agent: Sure. Please wait for a while.
customer: Sure.
agent: Thanks for waiting, there is no reservation found on your name.
customer: Ok. Thanks for your quick response.
agent: Thank you for availing us.

Output: no_reservation

Input: Consider Input: customer: Hello.
agent: Hello. How can I help you?
customer: My name is Thomas Taylor. I would like to spend my weekend at amusement park in Oakland. Can you help me in booking a ticket from JFK to OAK?
agent: On which dates you like to travel?
customer: My journey dates are 07/16 and 07/18.
agent: There is a flight with single connection, can I proceed for booking in 1019 flight?
customer: Please proceed.
agent: Your booking is confirmed it costs you 200. Thank you for choosing us.
customer: Thank you for your help.
Output: book