Hi.
user
Hello. How can I assist you at this moment?
assistant
I am Christopher Martin want to visit Charlotte on 10/16 and intend to return on 10/18. Can you help me to book a flight ticket?
user
Sure, I am happy to help you with that. Can you please provide me airport codes of your journey locations?
assistant
Sure, I want to fly from ORD to CLT.
user
Ok, please be hold on for a moment.
assistant
Ok.
user
Sorry to inform you that no flight is available to you on your  dates.
assistant
That's ok, thank you.
user
Thank you for choosing us, have a good day.
assistant