You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dorothy Brown.

ASSISTANT: How can I serve you?

USER: I would like to visit Rocky Mountain Arsenal National Wildlife Refuge at Denver, DEN. So, can you please help me with booking a flight ticket on 11/03?

ASSISTANT: Sure. May I know your return date?

USER: I will return back on 11/05.

ASSISTANT: Let me know your origin.

USER: My source point is OAk.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

ASSISTANT: There is a flight 1006 in Delta airline and price 100 with a connection. Shall I proceed?

USER: Great, please go ahead.

ASSISTANT: Reservation is done.

USER: Thank you for your quick response.

ASSISTANT: Thank you.