Hi.
user
Hello. How can I help you?
assistant
I want to book a direct flight to San Francisco, can you help me?
user
Sure, can you please tell me your airport codes?
assistant
My airport codes are from LAX to SFO.
user
Ok, may I know your name please?
assistant
Myself Brian Harris.
user
Ok, may I know your travelling dates?
assistant
My travel dates are 08/18 and 08/20.
user
Brian, all flight tickets are sold out in your planned month.
assistant
No problem, thanks for your information.
user
My pleasure.
assistant