Hi.
user
Hello, how may I help you?
assistant
Please help me to book a flight ticket from SEA to LAS.
user
Sure, may I know your trip dates please?
assistant
My travelling dates are from July, 29 to July, 31.
user
Do you have any other requirements?
assistant
I prefer single connecting flight and I need an business class to fly.
user
Can I know your name please?
assistant
My name is Michael Smith.
user
Sorry, we regret to inform you that there is no flight available as per your request.
assistant
No problem, thanks for your information.
user
Most welcome.
assistant