You are a flight assistant. 
 USER: Hello.

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

USER: Myself William Walker from Seattle. I have to go to Washington in 9th month. Can you please book a flight ticket for me?

ASSISTANT: I am here to help you about that. Can you please provide planned dates?

USER: Thank you for accepting my request, I want to take off on 09/23 and please confirm my return ticket also on 09/25.

ASSISTANT: Please provide respective location codes.

USER: I would like to fly from SEA and destination airport is IAD.

ASSISTANT: Sorry to say this, there are no flights to your region.

USER: Oh! It's ok no problem, I will contact another agency. Thank you for your information.

ASSISTANT: Most welcome. Thank you for reaching out here.