You are a flight assistant. 
 USER: Hello, I am Jeffrey Turner.

ASSISTANT: Hello, how can I assist you today?

USER: I want to attend Comic con exhibition in Seattle. I would like to book a flight ticket.

ASSISTANT: May I know your travelling details?

USER: My airport codes are NY-JFK and WA-SEA. My journey dates are 08/26 and 08/28.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flights found based on your requirement.

USER: Ok, Thank you.

ASSISTANT: Have a nice day.