Hi.
user
Hello, how can I assist you?
assistant
I am Larry Carter. I am planning to travel from DFW to DEN, can you help in booking  a flight for me?
user
Sure, I am here to help you out. Please provide us your trip dates.
assistant
My travelling dates are 07/18 to 07/20.
user
Ok, please be on hold for a while.
assistant
Sure.
user
Sorry, there is no flight available as per your given dates.
assistant
That's ok, thank you for your help.
user
You are welcome and thank you for choosing us.
assistant