You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am searching for the flight which is departing in the evening time from Denver. Can you please help me to book the ticket?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for your response.

ASSISTANT: Can you share me your travel dates?

USER: The preferable travel dates are Oct 02 and Oct 04.

ASSISTANT: Do you have any airline preference?

USER: I didn't have airlines preference but please make sure that the maximum connections in between my journey should be at least one.

ASSISTANT: Sure, I will definitely make that you have requested with us. May I know your landing airport code?

USER: The landing airport code is AUS.

ASSISTANT: for documentation purpose, may I know your name please?

USER: Sure, Christine Smith here.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: It's ok, not a problem with that. Anyhow thank you for your help.

ASSISTANT: Thank you for choosing us, have a good day.