You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Richard Thompson here.

ASSISTANT: How can I assist you?

USER: I am a writer and I would like to know the history of Rosie the Riveter which is in Oakland to write a book. Can you book a flight from DEN on 11/23?

ASSISTANT: Sounds good, may I know your destination and return date please?

USER: I would like to return back from OAK on 11/25.

ASSISTANT: Richard, there is a flight with AA airlines available with price 200. Shall I book the ticket?

USER: Yes, I am ok, you can proceed to book my ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1013.

USER: Thank you for your help in my ticket reservation.

ASSISTANT: Thank you for choosing our services.