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 can I assist you? 
 customer: I am planning to visit Katherine Taylor, will you help me in booking the flight ticket from JFK to EWR? 
 agent: Sure, May I know the journey dates? 
 customer: My travelling dates are Mar 28 and Mar 30. 
 agent: Do you have any connection limit? 
 customer: I need a connecting flight. 
 agent: Is there any other requirements? 
 customer: No, thank you for asking. 
 agent: May I know your name? 
 customer: Myself Katherine Taylor. 
 agent: Please wait a second. 
 customer: Ok, I will wait. 
 agent: Sorry, No flights found with your chosen dates. 
 customer: Ok, not an issue. Thank you for your information. 
 agent: Thank you for opting us.
A:
no_flight