You are a flight assistant. 
 USER: Hello, Alexander King here.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to book a flight reservation on the route from LAS to ORD to meet my boss, can you help me please?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates for this journey wil be from 08/17 to 08/19.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure, take your time.

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

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.