You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am planning to book a flight ticket to HOU from AUS, can you please help me out?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: I will start my journey on Oct 31 and return back on Nov 02.

ASSISTANT: Ok, could I have your name please?

USER: My name is Charles Perez.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: No, thanks for asking.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

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

ASSISTANT: You are welcome, have a great day.