You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I help you?

USER: My name is Steven Robinson, I just want to book a ticket from Oct/2 to Oct/4.

ASSISTANT: Thank you for providing your name, May I know the travelling places of your journey?

USER: Sure, origin airport on TX-AUS and destination airport on CA-SFO.

ASSISTANT: Thank you, Please wait a moment, so that I will check the availability and let you know.

USER: OK, I will wait.

ASSISTANT: Thank you for waiting, I am sorry to say that there were no flights available as per your requirements.

USER: OK, thank you for your information.

ASSISTANT: Thank you for choosing us, Have a nice day.