You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Scott Parker, I need a single connected flight for my journey to Denver in the month of July. Can you please help me in searching a flight for my journey?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, my desired travel dates are 07/09 and 07/11.

ASSISTANT: Can I know preferred airport codes please?

USER: Sure, my preferred airport codes are AUS and DEN.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Not a problem, anyways thank you for the help.

ASSISTANT: Thank you for opting us.