Hello.
Hello. How can I aid you?
Please book a flight ticket on dates Sept 11 and Sept 13.
Sure, I can help you.
Thank you.
Please share me your airport codes.
My airport codes are ORD and DEN.
Do you need any break?
Yes, I need a connecting flight.
Is there any other  specification?
I need a ticket in business class.
May I know your name?
My name is Richard Roberts.
 We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.
That's ok, thank you for the response.
Thank you for reaching us.