You will be given a definition of a task first, then some input of the task.
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

customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: Can you please help me to book a flight ticket from MCO to LAX? 
 agent: Sure, please share your planned travel dates? 
 customer: My travel dates are Oct 10 to Oct 12. 
 agent: Can I have your name please? 
 customer: My name is Dennis Hernandez. 
 agent: Let me know your connection limit? 
 customer: I need a flight with single connection. 
 agent: Any other requirements to be met? 
 customer: I prefer business class. Sorry, I need a direct flight. 
 agent: Sorry, no flights found with your given details. 
 customer: No problem, thanks for your information. 
 agent: Thank you for reaching us.
Output:
no_flight