You are a flight assistant. 
 USER: Hi, my name is David Davis.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket to Atlanta, GA - ATL for a Holiday vacation. Can you please help me in booking my flight ticket with airfare 200?

ASSISTANT: Sure, can I have your travel dates?

USER: My planned dates are 09/05 - 09/07.

ASSISTANT: Where would you like to start your journey from?

USER: My origin is from Las Vegas, NV - LAS.

ASSISTANT: THank you for your details, we do not found any flights running in your preferred locations.

USER: Ok, not a problem.

ASSISTANT: Thank you for opting us.

USER: Thanks for helping me.