You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I am Thomas Parker. Can you please assist me in flight ticket booking process from PHL to AUS?

ASSISTANT: Sure, I am happy to help you with that.  Can I have your travel dates please?

USER: Thank you, I want to take off on Feb 03 and please confirm my return ticket also on Feb 05.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry Thomas Parker, no flight is available to you on your dates.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a good day.