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 Richard Jones. 
 agent: Hello, how can I support you? 
 customer: Could you please help me with booking a flight to Seattle, SEA from New York, LGA? 
 agent: Sur, can you help me with your journey dates? 
 customer: I want to attend my sister's marriage, so you can book a ticket on 02/17 and return on 02/19. 
 agent: Sorry, no flights found on your given preferences. 
 customer: No problem, thank you for the information. 
 agent: Thank you for reaching us.
[EX A]: no_flight

[EX Q]: customer: Hello. 
 agent: Hello. How may I assist you? 
 customer: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that? 
 agent: Sure, I am here to help you out. May I know your name please? 
 customer: Thank you. I am Dennis Martin. 
 agent: Wait a moment please. 
 customer: Sure. 
 agent: Dennis Martin, we haven't found any reservation under your name in our database. 
 customer: Ok, no issues. Thanks for the information. 
 agent: Thank you for choosing us.
[EX A]: no_reservation

[EX Q]: customer: Hello, I am Lisa Young. 
 agent: Hello, how can I assist you? 
 customer: I want to visit Lake Harriet at MSP, can you please book a ticket for me? 
 agent: Sure. Can you please provide the travelling dates? 
 customer: I intend to travel on 08/12 to 08/14. 
 agent: Do you have any limitations? 
 customer: Price 5000. I need 1 connection. 
 agent: Please share your airport codes. 
 customer: Origin: DFW. 
 agent: Thanks for the information. We did not found any flights matching your criterion. 
 customer: Ok. Thank you. 
 agent: Thanks for choosing us.
[EX A]:
no_flight