You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you for today?

USER: I am Mary Johnson from Washington. Can you please book a flight ticket from DCA to SEA?

ASSISTANT: Mary Johnson I feel happy about your flight ticket booking. Can you please let me know your planned dates of your journey?

USER: Thank you for your positive response, I want to take off on 08/22 and please confirm my return ticket also on 08/24.

ASSISTANT: Please wait a while.

USER: Ok, take your time and find a best flight for me.

ASSISTANT: Sorry to convey you about the flight, there are no flights which can travel to your region on your planned dates of your journey.

USER: Oh! It's ok no problem, I will contact another airline agency. Anyway, thank you for the information.

ASSISTANT: You are welcome, thank you for reaching out here. Hope you have a nice day ahead.