You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: My name is Michael Hernandez, I want to book a flight from NV-LAS to meet my sister.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: I will fly on 03/16 and return on 03/18.

ASSISTANT: Ok, may I know your destination location airport code?

USER: My destination point is Denver, CO-DEN.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome, have a great day.