You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket to visit Redwood regional park at Oakland, please help me out.

ASSISTANT: Sure, we are hear to assist you. Can you share your travelling dates?

USER: I want to travel on 10/12 and return on 10/14.

ASSISTANT: May I know your landing and flying airport codes?

USER: I want to fly from WA- SEA to CA- OAK. I need the ticket within price 200.

ASSISTANT: May I know your name?

USER: I am Williams Thompson.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.