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 exactly I can serve you the best today?
customer: I am Katherine Anderson. Can you help me booking a flight ticket from LAX to PHL?
agent: Can you please share your travel dates that you have planned?
customer: I will start on Nov, 19 and return on Nov, 21.
agent: Ok, Do you like to go with a connecting or direct flight?
customer: I need a break in my journey.
agent: Ok, please wait a moment. let me search a flight for you.
customer: Sure.
agent: We have found a direct flight with AA airlines, flight number 1008 and the fare of 100. Shall I reserve a ticket for this airline?
customer: Please proceed with the booking.
agent: Sure, your ticket has been reserved.
customer: Thank you.
agent: Thanks for approaching us, wish you a great journey.
Example Output: book

Example Input: customer: Hello.
agent: Hello, how can I guide you for today?
customer: I'm Michelle Adams. I am planning to attend music concert at SFO, can you please help me with booking a flight ticket from PHX?
agent: Can you please share on what dates you are willing to travel?
customer: Sure, I would like to take off on 05/01 and return back on 05/03.
agent: Please give me a minute.
customer: Sure.
agent: Sorry, there are no flights available on your requested dates.
customer: Ok, no issues. Thank you for checking.
agent: Thank you for contacting us, have a nice day.
customer: You are welcome.
Example Output: no_flight

Example Input: customer: Hello.
agent: Hello, how may I help you?
customer: Myself John Martin. I just want to visit holy places at OAK from PHX, can you please book me a ticket?
agent: Sure, can you please specify me your dates of travel?
customer: Sure, my travel dates are Oct 2nd and Oct 4th.
agent: Do you have any requirements?
customer: My connection limit should be 1 and I can afford 5000 or less.
agent: There is a connecting flight 1010 of Frontier airlines, can I proceed?
customer: Sure, please proceed with that.
agent: Your booking is done, have a safe journey.
customer: Thank you for your kind service.
agent: Welcome.
Example Output:
book