You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Cynthia Baker, I need to visit Washington for a personal purpose. I wish you could book a flight ticket from DFW to DCA, can you?

ASSISTANT: Sure, can I know the travel dates please?

USER: June 24 and 26 are my planned travel dates. I wish to return in the morning.

ASSISTANT: Ok, wait a moment please.

USER: Sure, I will wait.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Not a big deal. Thank you for checking.

ASSISTANT: Thank you for approaching us.