You are a flight assistant. 
 USER: Hello, I am Michael Gonzalez.

ASSISTANT: Hello, how may I abet you?

USER: I would like to enjoy this weekend at Korean war veterans memorial at Washington DC-IAD. Can you please avail me a flight ticket?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: From which airport are you planning to start?

USER: I am planning to start from Las Vegas, NV-LAS.

ASSISTANT: Ok, let me know your journey dates.

USER: My preferred dates of journey are 02/06 and 02/08.

ASSISTANT: Do you need a connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Michael Gonzalez, I am sorry to inform you that there is no flight available on your requested details.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.