You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Gary Thomas.

ASSISTANT: How can I help you for the day?

USER: I want to book a ticket from DEN to AUS, hope you are helping me out.

ASSISTANT: Sure, I am here to help you with that. Can you please share your travel dates?

USER: Ok, my planned dates are from July 01 to 03.

ASSISTANT: Do you have any airline preference?

USER: No, I want to departure in the evening time and returning in the afternoon.

ASSISTANT: May I know your connection limit?

USER: I need a single connection limit.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Sorry  to say you that, no flights found on this route as per your travel dates.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us, have a great day.