Hello.
user
Hello. How may I help you?
assistant
I would like to celebrate my mother's birthday as a sudden surprise at San Francisco, please help me in booking at ticket.
user
May I know your trip dates?
assistant
My trip dates are 08/01 and 08/03.
user
Please share your airport code.
assistant
My nearest airport codes are DCA and SFO.
user
May I know your name?
assistant
My name is Linda Nelson.
user
I am sorry, there is no flights available.
assistant
Ok, no issue. Thank you for your information.
user
Most welcome.
assistant