Hi.
user
Hello.
assistant
I am Steven Moore.
user
How may I assist you today?
assistant
 I want to book a flight ticket to Las Vegas-LAS to visit Golden Gate bridge, so help me to find a best flight.
user
Steven Moore, please provide your planned dates for this journey?
assistant
My trip dates are 09/21 to 09/23.
user
May I know your origin airport code?
assistant
My source is SFO.
user
There are no flights available currently for you. Sorry for the inconvenience.
assistant
That's ok, thank you.
user
Thank you for choosing our services.
assistant