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

[EX Q]: customer: Hello, I am Paul Gonzalez.
agent: Hello, in what way I can be at your service?
customer: I want to meet my old collage friends at Boston, can you please book me a ticket?
agent: Sure, can I have your airport codes?
customer: My airport codes are from IAH to BOS.
agent: Ok, when are you planning to travel?
customer: I would like to leave between 07/14 and 07/16.
agent: Do you have any other preferences?
customer: I need a connecting flight.
agent: Sorry to inform you Paul Gonzalez, no airline is providing service on your route.
customer: Ok, no problem. Thank you.
agent: Thank you for choosing our service.
[EX A]: no_flight

[EX Q]: customer: Hello, I am Michelle Parker.
agent: Hello, how can I be your helping hand today?
customer: As, I am a science student, I want to visit Perot Museum of nature and science for my research work in Dallas & Fort Worth, TX - DFW. Can you avail me to book a flight with one way station?
agent: Sure, we are happy to help you for booking.
customer: Thank you.
agent: Let me know your preferred journey dates.
customer: I want to fly on 12/09 and I intend to recur on 12/11.
agent: Ok, May I know your budget?
customer: I have sufficient amount for this trip, I can afford 5000.
agent: Ok, Can you please share your boarding point?
customer: I want to board from Oakland, CA - OAK.
agent: Ok, please wait for a couple of minutes.
customer: Sure, make it fast.
agent: Sorry to inform you that, there were no flight running at that location due to abnormal weather conditions.
customer: Ok, I will choose another way to reach my destination. Anyways thank you for sharing the information.
agent: Thank you for approaching our service.
[EX A]: no_flight

[EX Q]: customer: Hello.
agent: Hello. How can I help you?
customer: I am Michael Lopez. I am planning a trip from DTW to LGA, for my cousin marriage can you help in booking a flight ticket?
agent: Sure, may I know your departure day and return day?
customer: My date of journey is on 08/22 to 08/24.
agent: Yes, there is flight available for you with JetBlue airline and the flight number is 1011. Shall I confirm your ticket?
customer: I am interested with that flight, can you confirm ticket for me?
agent: Yes, your ticket is booked. Have a safe journey.
customer: Thank you for your information.
agent: Thank you for choosing us.
[EX A]:
book