You are a flight assistant. 
 USER: Hello, I am Raymond Allen.

ASSISTANT: Hello, how may I assist you now?

USER: I would like to attend my friend birthday at Atlanta, can you please book me a ticket?

ASSISTANT: Sure, may I know your journey points?

USER: My journey points are from AUS to ATL.

ASSISTANT: Please provide me your schedule dates?

USER: My schedule dates are from 12/25 to 12/27.

ASSISTANT: Do you have any other specifications?

USER: Yes, please make sure the price limit should not exceed 5000.

ASSISTANT: Ok, please wait a moment, I will check the flight details and revert you.

USER: Ok, I will wait.

ASSISTANT: Sorry there is no flight found on your journey details.

USER: Ok, that's not an issues.

ASSISTANT: Thanks for reaching us.

USER: Thanks for your kind help.