You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please book a ticket from AUS to LAX to attend Innovation festival to share my ideas?

ASSISTANT: Sure, can you please share me with your dates of journey?

USER: My travelling dates are Dec 11 and Dec 13.

ASSISTANT: May I know your good name please?

USER: I am Kevin Phillips.

ASSISTANT: Are you looking for any other help from my side please?

USER: My depart time is morning.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Kevin, there is no flight found as per your travelling details.

USER: Ok, no issues. Thank you.

ASSISTANT: You are welcome.