You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Richard Evans. I would like to book a ticket from PHL to AUS, can you please help me out?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: I am travelling on these dates 01/28 and 01/30.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight is available for you.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us, have a nice day.