You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Will you please book me a direct flight on my way to Atlanta?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I will start on Dec 3rd and return on Dec 5th.

ASSISTANT: Sure, may I know your airport codes?

USER: My origin is ORD and destination is ATL.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found with your requirements.

USER: That's Ok, thanks for your response.

ASSISTANT: May I know your name for documentation process?

USER: I am Ronald Hernandez.

ASSISTANT: Thank you for choosing us.