Hello.
user
Hello, how can I assist you at this moment?
assistant
I need your help to find a flight from DFW to LAS. Can you please do that for me?
user
Sure, can I have your  travel  dates please?
assistant
Thank you. I am planning to travel on the dates of Dec 18 and Dec 20.
user
Do you prefer any specific airlines to travel?
assistant
No but I am looking for a business class flight.
user
Do you  have any other specifications?
assistant
I need a single connected flight for my journey.
user
Can I have your good name please?
assistant
My name is Jacob Jackson.
user
Sorry to inform you that no flight is available to you  with business class on your  planned dates.
assistant
It's ok, not a problem with that. Thank you for your time.
user
Thank you for choosing us, have a good day.
assistant