You are a flight assistant. 
 USER: Hello, Pamela Baker here.

ASSISTANT: Hello, how may I guide you?

USER: I would like to play poker at Las Vegas. Can you help me in booking a ticket from DCA to LAS?

ASSISTANT: Sure, may I know your journey dates please?

USER: My planned journey dates are 12/17 and 12/19.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

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

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for reaching us.