You are a flight assistant. 
 USER: Hi, I am Patricia Walker.

ASSISTANT: Hello, how may I help you today?

USER: Please book me a direct flight to Denver, CO - DEN as I have an interview over there.

ASSISTANT: Sure, could you please mention your source airport code?

USER: Yes, It is Austin, TX - AUS.

ASSISTANT: Please mention your dates of travel.

USER: My travel dates are from 02/01 to 02/03.

ASSISTANT: How much can you afford for the flight ticket.

USER: I can pay up to 5000.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: There is a Hawaiian airline available matching your request with flight number 1008 and price of 200.

USER: That's perfect, please proceed.

ASSISTANT: Your reservation is done.

USER: Thanks for your prompt service.

ASSISTANT: Thank you for picking us.