Hello.
user
Hello, what can I do for you?
assistant
I am Thomas Hill, I would like to visit Red Rock Canyon in Las Vegas. Can you please book a flight ticket?
user
OK, may I know  your airport codes and preferable dates?
assistant
Sure, airport codes are HOU and LAS on dates of 02/17 and 02/19.
user
Sorry for the inconvenience, there is no flight available for you.
assistant
Oh! It's ok fine. Thank you for your help.
user
Thank you for reaching us.
assistant