You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I would like to book a ticket from ATL to OAK, can you please help me out?

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

USER: I am travelling on these dates September 30th and Oct 2nd.

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

USER: I don't have any timing preference.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight.

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

USER: Ronald Mitchell here.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Ronald Mitchell, no direct flight is available to you on your dates.

USER: Ok no problem, thank you for your services.

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