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
Q: customer: Hello. 
 agent: Hello. How may I aid you at this moment? 
 customer: I am Jack Brown. I want to book a flight ticket to Charlotte CLT to enjoy my holiday trip, can you help me with booking a direct flight? 
 agent: Sure, please share your travelling dates? 
 customer: My travelling dates are 12/19 and 12/21. 
 agent: Do you need any halt in between the journey? 
 customer: I need a direct flight. 
 agent: Ok, may I know your origin airport code? 
 customer: My take off airport code is ATL. 
 agent: There are no flights found on your requested dates. 
 customer: Ok, no issues. Thank you. 
 agent: Thank you for reaching us.
A:
no_flight