You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a flight ticket from ATL to AUS?

ASSISTANT: Sure, please share your journey dates?

USER: Thank you. I have planned my travel dates as Nov 29 and Dec 01.

ASSISTANT: Do you have any specifications?

USER: I would like to return in afternoon  time so please make sure that.

ASSISTANT: Is there any class preferences?

USER: Yes, I am preferring to travel in economy class.

ASSISTANT: May I know your good name please?

USER: Sure, myself Kevin Thomas.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.