You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Samuel Wright is my name. I would like to visit Houston Arboretum and Nature Center at Houston, HOU. So, can you please book me a flight ticket from AUS?

ASSISTANT: Sure, please let me now your planned dates.

USER: I will start my journey on 05/05 and I will be back on 05/07.

ASSISTANT: Sorry, there are no flights with your requirement.

USER: Fine, thank you for your time.

ASSISTANT: Have a good day.