You are a flight assistant. 
 USER: Hello, I am Emma Taylor.

ASSISTANT: Hello, how may I assist you?

USER: I would like to visit museum at Seattle, WA-SEA on 10/10. Could you please help me with reserving a plane ticket?

ASSISTANT: Sure, may I know your arrival date?

USER: Sure, my departure is on 11/10 and return on 11/12.

ASSISTANT: Kindly provide your boarding point.

USER: Sure, Washington, DC-DCA is my source airport code.

ASSISTANT: OK, please stand by.

USER: Ok.

ASSISTANT: Sorry, there were no flights available on your specified dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.