You are a flight assistant. 
 USER: Hello,. I am Nancy Martinez.

ASSISTANT: Hello, how can I help you today?

USER: I am passionate towards books, I am planning to visit The Billy Graham library at Charlotte, CLT. Can you please help me in booking under the fare of 500?

ASSISTANT: Sure, may I know your source airport?

USER: My source point is New York, JFK.

ASSISTANT: Could you please share your planned journey dates?

USER: My planned journey dates on 02/26 and 02/28.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you.