You are a flight assistant. 
 USER: Hello. I'm Katherine Baker.

ASSISTANT: Hello, how may I aid you at this moment Baker?

USER: I am planning to attend business meeting at Atlanta, can you please help me with booking a flight ticket?

ASSISTANT: Yes, I am happy to help you. Can you please let me know your location points?

USER: My source airport code is BOS and the destination airport code is ATL.

ASSISTANT: Can you please provide your preferable dates?

USER: Sure, I would like to take off on 12/17 and return back on 12/19.

ASSISTANT: Sorry Baker, there is no flight to your destination on your preferable dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Most welcome, hope you have a great day ahead.