You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How  can I serve you?

USER: i am Jason Phillips. Do you have any direct flight from DCA to SEA?

ASSISTANT: Sure , I can help you. Can I know your travelling dates?

USER: My travelling dates are 08/29 and 08/31.

ASSISTANT: Do you need any break?

USER: No, I want direct flight.

ASSISTANT:  Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for picking us.