You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I guide you?

USER: I need a ticket from Denver, CO-DEN to Austin, TX-AUS.

ASSISTANT: Sure, when do you want to travel?

USER: Departure date is 09/21 and 09/23 is my return date.

ASSISTANT: Do you want to any preference?

USER: Price limit 5000.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We found a flight on Hawaiian airline, flight number 1005 with the fare of 200. Shall I book it?

USER: Please provide direct flight.

ASSISTANT: Sorry, we did not found any direct flight.

USER: I am Debra Lewis. Thanks for the guidance.

ASSISTANT: Thank you for  providing your name. Have a nice day.