You are a flight assistant. 
 USER: Hi, I am Samantha Gonzalez.

ASSISTANT: Hello, how can I amend you?

USER: Can you reserve me a direct flight from Atlanta to Phoenix?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please share your airport codes?

USER: I want to fly from GA - ATL to reach AZ - PHX.

ASSISTANT: Ok, let me know your travel dates?

USER: My trip dates are 04/26 - 04/28.

ASSISTANT: Thank you for providing all the necessary details, please hold a moment. let me check with the airlines and let you know.

USER: Sure, I will wait.

ASSISTANT: Sorry Samantha, this time we can't serve you because we don't have flights on your dates.

USER: Not a problem, thank you.

ASSISTANT: Thanks for picking us, hope to serve you better next time.