You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to spend my free time with my family members in Denver, will you please help me to get flight ticket with 0 connection?

ASSISTANT: Yes, I will try for my best. Can I know your travelling dates?

USER: The dates are from 08/09 to 08/11.

ASSISTANT: Ok. Could you tell me your flying airport codes?

USER: I want to start my journey from DCA and would like to land in DEN.

ASSISTANT: Hold on for a moment.

USER: Ok.

ASSISTANT: Sorry to say that there are no flights found matching your requirement. Sorry for the inconvenience.

USER: No problem. Anyways, thank you for your time.

ASSISTANT: Can I know your name for documentation purpose?

USER: My name is Debra Davis.

ASSISTANT: Thank you for reaching us.

USER: Thank you.