You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Pamela Taylor. Can you help me to book a flight ticket from AUS to LAX?

ASSISTANT: Sure, can you please tell your travelling dates?

USER: Ok, date of departure is 11/24 and the return date is 11/26.

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

USER: Ok. Thank you for trying your best.

ASSISTANT: Thank you and have a nice day.