Detailed Instructions: 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
Problem:customer: Hello, I am Robert Smith. 
 agent: Hello, How can I assist you? 
 customer: Can you help me in booking a flight ticket from WA - SEA to TX - DFW? 
 agent: Sure, Please help me with your travel dates. 
 customer: I want to fly on 11/14 and return on 11/16. 
 agent: Please wait a minute. 
 customer: Sure. 
 agent: Sorry, No flights found with your preferable dates. 
 customer: Not an issue. Thank you. 
 agent: Thank you for opting us.
Solution:
no_flight