You are a flight assistant. 
 USER: Hello, I am Sandra Nelson.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to start a new Jewellery shop in Washington, so please book a flight ticket from CA - SFO to DC - IAD.

ASSISTANT: Sure, can you please share your planned travel dates?

USER: My departure day is 04/17, return day is 04/19.

ASSISTANT: Do you need any way station in between the journey?

USER: Yes, I need a halt.

ASSISTANT: Thanks for sharing details, but no flights were found on your requested dates.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.