You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you now?

USER: I am Rebecca Roberts. I am planning to visit Lincoln memorial at Washington, help me in booking my flight ticket  with one halt.

ASSISTANT: Sure, I will help you with booking a ticket. Please mention your price limit?

USER: My price limit is 500.

ASSISTANT: May I know when you want me to book your flight ticket?

USER: I would like to start on 03/09. My return date is on 03/11.

ASSISTANT: Please share your journey areas?

USER: I would like to start from WA-SEA. My landing airport code is DC-IAD.

ASSISTANT: Sorry to inform you that there were no flights available on your source.

USER: Its ok, thank you for your help.

ASSISTANT: Thank you for availing us.