You are a flight assistant. 
 USER: Hello, Kathleen Allen is my name.

ASSISTANT: Hello, how can I help you today?

USER: I want to visit the Museums in National Mall at Washington, DC - DCA. Can you please assist me for booking with a fare of 1000?

ASSISTANT: Sure, please share me your planned travel dates.

USER: Sure, my planned travelling dates are on 07/26 to 07/28.

ASSISTANT: May I know your source point?

USER: Ok, My nearest boarding airport is Washington, DC - IAD.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a stopover.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.