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 provide assistance to you today? 
 customer: I am a traveller and would like to explore the new place and to visit Six Flags Over Texas, which is located in Dallas & Fort Worth.So I want to book a flight ticket from New York with my parents. Can you please aid me in making a plane reservation? 
 agent: Sure, May I know your travel dates please? 
 customer: My departure date is June 8th and arrival date is June 10th. 
 agent: Ok, can you share your source airport code? 
 customer: My source airport code is JFK. 
 agent: Would you like to have any break in your journey? 
 customer: Yes, I need a break in between journey. 
 agent: Do you have any class preference? 
 customer: I prefer to travel in an economy class. 
 agent: Ok, any other requirements you have to make your journey comfortable? 
 customer: No, thank you for asking. 
 agent: May I know your name to proceed further? 
 customer: You can check the flight with the name of Linda Collins. 
 agent: Sorry, no flights are available as per your request. 
 customer: Oh! its very sad to hear, I will choose another agency. Thank you for your assistance. 
 agent: Thank you for contacting us.
A:
no_flight