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. 
 agent: Hello. 
 customer: I am Timothy Martin. 
 agent: How may I help you? 
 customer: I need to book a flight ticket from New York, NY-EWR to Boston, MA-BOS. 
 agent: Sure, help me with the travel dates? 
 customer: I want to travel on dates 10/16 and 10/18. 
 agent: We do not found any flights running in your preferred routes. 
 customer: No problem, thank you for your help. 
 agent: Thank you for opting us.
[EX A]: no_flight

[EX Q]: customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I am Elizabeth Anderson. I am planning to visit Magic Kingdom at Orlando, could you please help me with booking a flight ticket from LAS to MCO? 
 agent: Yes, I can help you. Can you share me your travelling dates? 
 customer: I would like to take off on 05/27 and return on 05/29. 
 agent: Give me a moment. 
 customer: Sure, take your time. 
 agent: I have found a flight ticket with a price of 100 and 1 connection. 
 customer: Please confirm the booking. 
 agent: Ok, your ticket is booked. 
 customer: I really appreciate your help, thank you for your service. 
 agent: Thank you for contacting us.
[EX A]: book

[EX Q]: customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I want to cancel my recent reservation due to sudden postpone of my exams. Can you help me with that? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: May I know your name? 
 customer: I am Emma Moore. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Sorry, there are no reservation found on your name. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for choosing us.
[EX A]:
no_reservation