You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be there for you?

USER: I am Kathleen Collins. I am planning to attend Hockey competition in Las Vegas LAS from DCA. Can you make reservation for me?

ASSISTANT: Sure, when are you planning to make your trip?

USER: Ok, my planned trip dates are on Feb 02 and return on Feb 04.

ASSISTANT: Do you need a flag stop?

USER: Yes, I need a direct flight.

ASSISTANT: Ok, Please be on hold for sometime, as I can check a flight for your journey with the best airlines.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for approaching us.