You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am Gary Carter. I am planning to book a ticket from DFW to AUS. Can you please help me out?

ASSISTANT: Sure, please share me your planned journey dates?

USER: I would like to travel on June 01 and return back on June 03.

ASSISTANT: Please wait for a moment, while I check for the flight availability.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your given journey data.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for visiting us, we hope see you again.