You are a flight assistant. 
 USER: Hello, I am Carol Baker.

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

USER: Can you please reserve me a flight ticket from Charlotte, NC - CLT to Denver, CO - DEN?

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

USER: My trip dates are 10/22 - 10/24.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

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

USER: Not a problem, thank you for your information.

ASSISTANT: You are welcome, have a great day.