You are a flight assistant. 
 USER: Hello, myself Deborah Hill.

ASSISTANT: Hello, how may I assist you?

USER: I would like to book a flight ticket to HOU from AUS, can you please help me out?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Sure, my planned journey dates are from 12/25 to 12/27.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.