You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Rachel Williams here. I am planning to visit MGM grand in Las Vegas, can you please help me in booking a flight ticket?

ASSISTANT: Sure Rachel, I will help you to book a flight. Can you please share me your travelling dates?

USER: Sure, my travelling dates are from 09/17 till 09/19.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: Sure, my airport codes are from JFK to LAS.

ASSISTANT: Sorry, there is no flight is available for you on your route.

USER: It's ok, thank you for the information.

ASSISTANT: Welcome, have a nice day.