You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best I can aid you now?

USER: Can you please check the availability of flights in between the points from DEN to IAH?

ASSISTANT: Surely, I will help you out. Kindly, share your preferable dates.

USER: My scheduled travelling dates are Nov 11 and 13.

ASSISTANT: Do you prefer either a connecting flight or a direct flight?

USER: I need a direct flight.

ASSISTANT: Can I have your name please?

USER: Sure, my name is Patrick Carter.

ASSISTANT: Ok, let me know your class preference.

USER: I am fine with any class.

ASSISTANT: Do you have any other essentials to say?

USER: No.

ASSISTANT: Ok, please wait for a few minutes.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that no flights were found based on your information.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for availing our services.