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

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.
book

customer: Hello. 
 agent: Hello. 
 customer: David Evans here. 
 agent: How can I help you at this moment? 
 customer: I would like to visit New York for a business conference, can you please help me out with booking of a flight ticket to go there? 
 agent: Sure, I will help you in booking flight ticket. 
 customer: Thank you. 
 agent: Can you please mention your travel dates for booking flight ticket? 
 customer: Sure, I am planning to go on 10/03 and please book my return ticket on 10/05. 
 agent: May I know your preferable airport code names for further process? 
 customer: Sure, my nearest genesis airport code is SEA and my destination airport code is LGA. 
 agent: Please hold on a moment, I will check flight availability in this route. 
 customer: Ok, take your time but try to bring a best flight in my route. 
 agent: Based on your information, Southwest airline is ready to serve you with 1 connection with a minimum fare of 100 is available for you. Shall I proceed with this? 
 customer: That's fine, you can proceed with booking. 
 agent: Your flight ticket is booked successfully, flight number is 1021. 
 customer: Thank you for your assistance in booking of my ticket. Have a nice day. 
 agent: You are welcome.
book

customer: Hello. 
 agent: Hello. 
 customer: I am Melissa Hall. 
 agent: How can I help you today? 
 customer: I need your assistance in cancelling my recent reservation, can you help me with it? 
 agent: Sure, I will help you to cancel your reservation. 
 customer: Thank you. 
 agent: Please allow me a moment. 
 customer: Sure. 
 agent: Sorry, no reservation found on your name to cancel your reservation. 
 customer: That's fine, thank you for your information. 
 agent: Welcome, have a nice day.
no_reservation