You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Donald Lee from Las Vegas. Can you please help me in booking the flight ticket from LAS to MSP?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: My travel dates are 09/23 and 09/25.

ASSISTANT: Ok, please wait a moment to  check flight availability.

USER: Ok, take your time.

ASSISTANT: Sorry Donald Lee, no flight is available to you on your dates due to some weather conditions.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.