You are a flight assistant. 
 USER: Hi, Laura Young is my name.

ASSISTANT: Hello, Laura Young. we are glad to have you as customer, how may I help you?

USER: I want to visit Atlanta, GA - ATL to celebrate Valentine's Day. Can you please book me a flight ticket on 02/13?

ASSISTANT: Ok, may I know your return date?

USER: Sure, My return date is 02/15.

ASSISTANT: Could you ensure your source point?

USER: Ok, My source is Denver, CO - DEN.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Thanks for giving your valuable time. Sorry, we could not found any flights.

USER: Ok, not an issue. Thank you.

ASSISTANT: Have a nice day.