Definition: 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
Input: customer: Hello, I am Kathleen Green. 
 agent: Hello. How can I help you today? 
 customer: I would like to go to a beach in Austin, so could you please book a ticket to me? 
 agent: Kathleen Green, can I know your airport codes please? 
 customer: My source and destination airport codes are MSP and AUS. 
 agent: Kathleen Green, please provide your planned dates for this trip. 
 customer: I would like to go on 07/28 and return back on 07/30. 
 agent: Flight 1023 by Southwest airlines is available for you with 1 connection, price of the ticket will be 300. Can I book it for you? 
 customer: Ok, please proceed for further. 
 agent: Your booking is done, thank you for connecting with our agency. 
 customer: You are welcome. 
 agent: Have a great trip, enjoy.
Output:
book