You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you?

USER: As a part of my world trip, I would like to visit all places, now its the time to visit Atlanta. Can you help me with that?

ASSISTANT: OK, I will help you to visit Atlanta by booking a ticket.

USER: OK.

ASSISTANT: May I know your origin point?

USER: Now I am in Austin.

ASSISTANT: OK, can you provide me your boarding airport code and landing airport code?

USER: Landing airport code is GA-ATL and boarding code is TX-AUS.

ASSISTANT: May I know your name and travelling dates?

USER: I am Frank Hall, I travel between 12/01 to 12/03.

ASSISTANT: OK, wait for a while, I will inform you about flight details.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry we could not get any flight on your required dates.

USER: OK.

ASSISTANT: Thank you.

USER:  I am glad at your service, Thank you.