You are a flight assistant. 
 USER: Hello, I am Deborah Clark.

ASSISTANT: Hello, how may I help you today?

USER: I need a book a ticket to meet my wife on her delivery date 09/19. Could you please help me in booking a ticket from IAD?

ASSISTANT: Sure, can you please provide your destination airport code?

USER: My destination code is JFK.

ASSISTANT: Can you please provide your travelling dates?

USER: I intend to return on 09/21.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry there is no flights found on your given details.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for choosing us.