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: Hi. 
 agent: Hello, how may I help you? 
 customer: I am planning on travelling to JFK for an event, can you please help me in booking a flight ticket from DEN? 
 agent: Sure, please share your journey dates? 
 customer: My journey dates are in Feb from 10th to 12th. 
 agent: Do you have any specifications? 
 customer: I would like to depart in afternoon. I prefer to travel with single connecting flight. 
 agent: Is there any class preferences? 
 customer: No, I am comfortable with any class. 
 agent: May I know your good name please? 
 customer: Virginia Brown here. 
 agent: Please wait for a while. 
 customer: Sure, take your time. 
 agent: Thank you for your time, unfortunately no flights available on that route. 
 customer: That's ok, thank you for your information. 
 agent: Thank you for choosing us.
A:
no_flight