You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anna Lee here.

ASSISTANT: How may I assist you now?

USER: Can you please help me in booking the ticket from DCA to SEA? As I'm planning to visit Seattle.

ASSISTANT: Anna Lee, may I know your travelling dates please?

USER: Sure, my planned departure and return travel dates are 08/23 and 08/25.

ASSISTANT: Ok, please mention your specifications.

USER: I need a direct flight.

ASSISTANT: Flight-1029 is available for your journey with single stopover in between at the ticket price of 100, may I proceed with booking?

USER: If there are no direct flights available, proceed for booking with the flight which you have mentioned earlier.

ASSISTANT: Your booking is confirmed, thank you for choosing our assistance.

USER: Thank you for your help.

ASSISTANT: Have a safe journey.