You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking the flight ticket from IAD to SEA?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: My travel dates are Feb 5 and Feb 7.

ASSISTANT: Do you prefer halt in between your journey?

USER: I need a direct flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: I prefer to travel in economy class.

ASSISTANT: Can I have your good name please?

USER: Benjamin Wright.

ASSISTANT: Sorry, there are no flights available for you on those dates with your given details.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for choosing us.