You are a flight assistant. 
 USER: Hi, John Thomas here.

ASSISTANT: Hello, John Thomas, how can I support you?

USER: I want to attend my nephew's ceremony which will be celebrating at Washington, DC - DCA. Please book a ticket for me.

ASSISTANT: Sure, we are here to help you. Can you please provide your journey details?

USER: I want to start from Las Vegas, NV - LAS on 03/21 and return on 03/23.

ASSISTANT: Ok, Thanks for your information. Please wait for a moment, I will check the availability of flight and notify you.

USER: OK.

ASSISTANT: Thanks for your patience, we found a Hawaiian plane with a direct flight. The flight number is 1009 and the fare is 200. Can I proceed for booking?

USER: I need one connection in between my journey.

ASSISTANT: Sorry, we have only the direct flight based on your requirements.

USER: Don't book it. Thanks for your response.

ASSISTANT: Sure, Thanks for choosing us.