You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am James Clark. Can you help to book a flight ticket to AUS from HOU?

ASSISTANT: Can you please tell your travelling dates?

USER: Ok, my travel dates 10/02 and 10/04 respectively.

ASSISTANT: Spirit airline is available with 1 connection. Shall I proceed with it?

USER: No, please check for a direct flight.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: Thank you for you assistance.

ASSISTANT: Thank you and have a nice day.