You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: My name is Stephen Davis. I have a business meeting in Las Vegas, can you help me for booking a flight ticket?

ASSISTANT: Sure, please share your planning journey dates.

USER: My travelling dates are from 06/16 till 06/18.

ASSISTANT: Kindly share your airport codes?

USER: My travelling airport codes are from CLT to LAS.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome.