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. 
 agent: Hello, how can I aid you for today? 
 customer: I want to fly to CA to visit Disney Land on July 15th and my return date will be on July 17th, can you please help me in booking? 
 agent: I am here to help you about that, can you please provide your nearest airport codes of journey? 
 customer: Sure, my source airport code is ATL and my destination airport code is LAX. 
 agent: Will you please let me know if you need a connecting flight or direct flight for this trip? 
 customer: I want to fly in a connecting flight for this time. 
 agent: Can you please provide your name for booking purpose? 
 customer:  I am George Taylor. 
 agent: Do you have any other requirement for your journey? 
 customer: I need to depart in the morning. 
 agent: Sorry George Taylor, there are no flights which travels to your region on your planned dates of journey. 
 customer: That's ok, not an issue. Thank you for your information. 
 agent: You are welcome, thank you for reaching us.
Output:
no_flight