You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Brandon Williams here, can you please help me out in booking the ticket from AUS to DEN? As I'm planning to visit Denver botanical gardens over there.

ASSISTANT: Sure, I am here to help you. Can you please share your travelling dates?

USER: Sure, I want to depart from here on 03/18 and return by 03/20.

ASSISTANT: Ok, please be on hold.

USER: Ok, please search for the flights with 1 connection.

ASSISTANT: Thank you for waiting, there is no flight available on this route based on your details.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for approaching us.