You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Ronald Jones. I want to book a ticket from SEA to LAX, could you please assist me?

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

USER: My travelling dates are on Dec 14 and Dec 16.

ASSISTANT: Do you have specifications?

USER: I need to depart at afternoon.

ASSISTANT: Please wait for a moment.

USER: Make sure that I need to return at evening time.

ASSISTANT: Sorry, there is no flight available in this route.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for approaching us.