You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you now?

USER: Myself Joshua Wilson. I want to make my flight reservation from OAK to LAS, can you please help me?

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

USER: Yes, I want to depart on Mar 6th and I want to return back on Mar 8th.

ASSISTANT: Do you have any preferring timings to travel?

USER: I would like to depart in the afternoon.

ASSISTANT: Sorry Joshua Wilson, no flight is available to you on your dates.

USER: Sad to hear that. Anyway, thank you for checking.

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