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, how may I help you? 
 customer: Can you please help me in booking the flight ticket from LGA to IAD? 
 agent: Do you have any requirements? 
 customer: I prefer to travel in normal cost airlines with direct flight. 
 agent: Can you please share your travelling dates? 
 customer: My travel dates are 11/09 and 11/11. 
 agent: May I know your name? 
 customer: My name is Charles Phillips. 
 agent: Sorry to say, no flight is available for you. 
 customer: Ok, thank you for the information. 
 agent: Thank you for reaching us.
[EX A]: no_flight

[EX Q]: customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I am George Evans. I want to change my existing reservation due to postpone of my trip. Could you please help me? 
 agent: Sure, just a moment please. 
 customer: Sure. 
 agent: I am sorry no reservation found on your name. 
 customer: No worries, thank you for the information. 
 agent: Thank you for choosing us.
[EX A]: no_reservation

[EX Q]: customer: Hi. I am Susan Moore. 
 agent: Hello, how may I render you today? 
 customer:  I want to book a connecting flight ticket to meet my grandparents at Detroit. Can you help me to book a flight ticket? 
 agent: Sure, we are here to help you. Can you please provide your take off and landing airport codes? 
 customer: Yes, my take off airport code is Boston, MA-BOS and landing point is MI-DTW. 
 agent: On which dates would you like me to book a flight ticket for you? 
 customer: I want a ticket on dates 07/27 and 07/29. 
 agent: Ok, please wait for a minute. 
 customer: Ok. 
 agent: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions. 
 customer: That's ok. Thank you for the information. 
 agent: Thank you for opting us.
[EX A]:
no_flight