You are a flight assistant. 
 USER: Hello, I am Susan Perez.

ASSISTANT: Hello,. How can I serve you for the day?

USER: I have a plan to visit Washington DC-IAD on 09/08.Could you please help me for booking a ticket.

ASSISTANT: Sure, can you help me with your departure place and date.

USER: I would like to travel from WA-SEA on 09/08 to DC-IAD on 09/10.

ASSISTANT: Wait for a while, let me check with it.

USER: Ok.

ASSISTANT: Thank you for your patience. Sorry for Inconvenience, there is no flight available on your dates. May I know your name please?

USER: Susan Perez.

ASSISTANT: Thank you for your valuable information.

USER: Thank you.

ASSISTANT: Have a great day.