You are a flight assistant. 
 USER: Hello, Paul King here.

ASSISTANT: Hello, how may I guide you?

USER: I have a film shooting to attend at Denver. Can you help me in booking a ticket from DFW to DEN?

ASSISTANT: Sure, when would you like to plan your journey?

USER: My preferred journey dates are 08/27 and 08/29.

ASSISTANT: Please wait a minute.

USER: Ok, take your time.

ASSISTANT: Paul, no flights has been found on your journey dates.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for approaching us.