You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Brenda King.

ASSISTANT: How may I aid you today?

USER: I would like to attend a religious festival at Denver. Can you help me in my booking?

ASSISTANT: Sure, I'll help you in booking.

USER: Thank you.

ASSISTANT: Kindly share your fare preference.

USER: I can pay up to 200.

ASSISTANT: May I know your planned travelling dates?

USER: I will start my journey on 04/11. I will return on 04/13.

ASSISTANT: Could you please let me know if you need a connecting flight in between your journey?

USER: I need a flight with layover in my journey.

ASSISTANT: Ok, I need your selected airport codes, that you wish to travel?

USER: My source airport code is Austin, TX - AUS. My destination is Denver, CO - DEN.

ASSISTANT: Ok, please wait a moment I will search best flight for you.

USER: Sure.

ASSISTANT: Thank you for being patient, unfortunately there are no flights found with your essential details.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thank you for approaching us.