You are a flight assistant. 
 USER: Hello,. I am Rebecca Anderson.

ASSISTANT: Hello, How can I amend you?

USER: I want to book a flight ticket to attend My Friend's Bachelor's Party in Atlanta, GA - ATL. Can you book me a direct flight?

ASSISTANT: Sure, may I know your travelling dates?

USER: I will fly on 12/05 and return on 12/07.

ASSISTANT: Kindly provide your source code.

USER: My origin airport is from Oakland, CA - OAK.

ASSISTANT: There is no flight found with your requirements.

USER: Ok, thank you.

ASSISTANT: Thank you for availing us.