You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you please book a direct flight to Washington?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travel dates are 08/17 and 08/19.

ASSISTANT: Could you please provide your journey airport codes?

USER: My airport codes are EWR to DCA.

ASSISTANT: May I know your name?

USER: Myself Deborah Edwards.

ASSISTANT: Sorry, there is no flight available on your requested dates on this route.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us, have a nice day.