Hello.
user
Hello, how may I serve you at this moment?
assistant
I am Carol Roberts. I am planning to attend Tennis competition in Los Angeles LAX from DEN. Can you find a flight ticket for me?
user
Sure, I will help you. Please send your travelling dates.
assistant
Ok, my planned trip dates are on Sept 25 and return on Sept 27.
user
Noted. Do you have any preferences?
assistant
Yes, I need a business class.
user
Sorry, there is no flight available matching your requiement.
assistant
Ok, not an problem. Thank you for your information.
user
You are welcome, have a nice day.
assistant