You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please book me a plane ticket with 0 connections on my way?

ASSISTANT: Can I have your name please?

USER: I am Ronald Hernandez.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: I am planning to start on Dec 3rd and return on Dec 5th.

ASSISTANT: May I know your airport codes?

USER: My origin is AUS and destination is DEN.

ASSISTANT: Do you have any other requirements to be met?

USER: No.

ASSISTANT: Sorry, there is no flight as per your requests.

USER: That's alright, thanks for your assistance.

ASSISTANT: Thank you for reaching us.