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 Larry Campbell. 
 agent: Hello, how can I help you? 
 customer: I want to meet my college friend at San Francisco, SFO. 
 agent: Ok. 
 customer: Can you help me in booking with a connecting flight? 
 agent: Sure, we are mirthful to help you. 
 customer: Thank you. 
 agent: Can you please let me know your journey dates? 
 customer: My travelling dates are from 10/23 to 10/25. 
 agent: What is your take off airport code? 
 customer: I am boarding at Boston, BOS. 
 agent: Please wait a minute, I will search a flight for you. 
 customer: Sure. 
 agent: Thanks for your time. 
 customer: Ok. 
 agent: Unfortunately, there are no flights found on your route. 
 customer: Ok, No problem. Thanks for the information. 
 agent: Thank you for choosing us.
[EX A]: no_flight

[EX Q]: customer: Hi. 
 agent: Hello, How can I assist you? 
 customer: Can you cancel my recent reservation? 
 agent: Sure, May I know your name? 
 customer: Sure, I am Amy Taylor. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: We have found a reservation on your name, Shall I cancel it? 
 customer: Proceed. 
 agent: Your ticket has been cancelled. 
 customer: Thank you. 
 agent: Thank you for opting us.
[EX A]: cancel

[EX Q]: customer: Hi, I am Janet Taylor. 
 agent: Hello, may I know how best I can help you today? 
 customer: I want to book a flight ticket to Las Vegas with price under 200. can you please help me with it? 
 agent: Sure, we are rapturous to help you. May I know on what dates would you like to travel? 
 customer: Travel dates are 02/10 and 02/12. 
 agent: Help me with your depart and arrival airport codes. 
 customer: Airport codes are OAK-LAS. 
 agent: Ok, please wait a moment, let me search a flight for you. 
 customer: Ok. 
 agent: There is a flight found with AA airline of flight number 1000 and single connection flight. Shall I proceed? 
 customer: You can proceed with booking. 
 agent: Your booking has been done. 
 customer: Thanks for the help. 
 agent: Thank you for opting us.
[EX A]:
book