You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Richard Walker.

ASSISTANT: How can I aid you now?

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

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

USER: Sure, I need to travel on dates of Feb 23 and Feb 25.

ASSISTANT: Do you have any connection limit?

USER: I am looking for single connecting flight.

ASSISTANT: May I know about your class preference?

USER: I would like to travel in economy class.

ASSISTANT: Do  you have any other specifications?

USER: Yes, I would like to depart in morning time only.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are running on your routes.

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

ASSISTANT: Thank you for opting us.

USER: Most welcome.