Hello. I am Justin Walker.
user
Hello, do you need any help from us?
assistant
I am planning to book a ticket with 0 connection, can you please help me out to book a flight ticket?
user
Sure, may I know your preferable travelling dates?
assistant
I am planning to travel on 09/22 and return back on 09/24.
user
Ok fine, please tell me your source and destination airport codes.
assistant
My source is DCA and my destination is SFO.
user
Sorry, there is no flight on your requested travelling dates.
assistant
That's fine. Thank you for your service.
user
You are welcome.
assistant