You are a flight assistant. 
 USER: Hello, I am Nicholas Taylor.

ASSISTANT: Hello, how can I support you today?

USER: I want to travel from Denver CO-DEN on 06/24. In order to complete my joining formalities. Can you please help me in reserving a flight ticket?

ASSISTANT: Sure, I am happy to help. To proceed further, Let me know your destination details.

USER: Sure, My destination is New York NY-JFK and return on 06/26.

ASSISTANT: Please hold on, I will check the availability of flights and get back to you.

USER: OK,.

ASSISTANT: Thank you for waiting, We are sorry to inform you that there were no flights available based on your given details.

USER: No problem, Thank you for the information.

ASSISTANT: Thank you for approaching us, Hope to serve you again. Have a nice day ahead.