You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit the Redwood regional park which is located in Oakland, OAK. Can you avail me to book a flight ticket?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My travel dates are Aug 29 and 31.

ASSISTANT: May I know from where you want to travel?

USER: I want to travel from Washington, DCA.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I need a break in my journey.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I need to catch my return flight in the evening time.

ASSISTANT: May I know your name for further process?

USER: Amy Phillips here.

ASSISTANT: Ok, please wait a minute I will get back to you with the flight details.

USER: Sure.

ASSISTANT: Thank you for being patient, we didn't find any flights which matches your requirement.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.