You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Carol Hill here. I have to attend a music event at CLT, can you help me to book a flight ticket from LAS?

ASSISTANT: Sure, I am here to help you with that. Can you please share your travel dates to proceed further?

USER: My planning dates are 09/27 and 09/29.

ASSISTANT: Ok, please be on hold.

USER: Sure, take your own time.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

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

ASSISTANT: Welcome.