You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Cynthia Roberts. I am looking to book a flight ticket from SEA to DCA to meet my friend. Can you help me for booking?

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

USER: My travelling dates are from 11/06 till 11/08.

ASSISTANT: Sorry, no flights are available on your planning dates.

USER: That's ok, thank you for choosing us.

ASSISTANT: Welcome, have a nice day.