Q: 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 support you? 
 customer: Can you please book a ticket from ATL to LGA? As I'm planning to visit Statue of Liberty. 
 agent: Sure, we are here to assist you. May I know your itinerary dates? 
 customer: Sure, my planned departure and return travel dates are 16th and 18th of December. 
 agent: Would you like to travel in business class or economy class? 
 customer: I prefer business class to travel. 
 agent: May I know your connection limit? 
 customer: My maximum connection has to be 1. 
 agent: Sorry to notify to you that, there are no flights available with your needs. 
 customer: That's ok, thank you for giving the information. 
 agent: For documentation, may I know your name please? 
 customer: Yes, my name is Dennis Phillips.
A:
no_flight