You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: Will you please book me a plane ticket from ATL to DEN?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: I will leave on Mar 22nd and arrive on Mar 24th.

ASSISTANT: Ok, please let me know the timings of your journey.

USER: I don't have any time restriction.

ASSISTANT: Do you have any other specifications?

USER: Yes, I am looking for an economy class and need 1 stop over within my route.

ASSISTANT: Can I have your good name please to proceed further?

USER: I am Raymond Miller.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Raymond Miller, no flight is available to you on your dates.

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

ASSISTANT: Thank you for choosing us, have a good day.