You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Davis.

ASSISTANT: How can I support you today?

USER: I am planning a get together party with my school friends at Denver, can you please reserve me a flight ticket from Oakland, OAK?

ASSISTANT: Sure. May I know your landing point?

USER: I have to land at Denver, DEN.

ASSISTANT: Let me know your trip dates.

USER: My journey dates are from 08/24 to 08/26.

ASSISTANT: Thanks for waiting, there is no flights found on your given requirements.

USER: It's ok. Thank you.

ASSISTANT: Thank you for availing us.