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
Q: customer: Hello. I am William Carter. 
 agent: Hello, how may I aid you today? 
 customer: I want to book a ticket from Dallas & Fort Worth, TX - DFW. Can you please help me with book a connection of flight? 
 agent: Sure, let me know your destination airport code? 
 customer: My destination airport code is Atlanta, GA - ATL. 
 agent: When are you planning to travel? 
 customer: I want to fly on 08/17. Return date is 08/19. 
 agent: Thank you for providing your name, there are no flights found with your specifications. 
 customer: Not an issue. 
 agent: Thank you for opting our agency. 
 customer: Thanks for the information.
A:
no_flight