Hello.
user
Hello, how may I help you?
assistant
I am Gary Walker and I want to book a flight ticket to attend a seminar which is  going to held at TX-DFW from CO-DEN.
user
Ok, please provide your journey dates for further process.
assistant
My traveeling dates are from 12/04 to 12/06 with direct flight.
user
Ok, please wait a minute.
assistant
Ok.
user
Thank you for waiting, sorry to inform there was no flight found matching your details.
assistant
No issue. Thank you.
user
Thank you for choosing us, have a nice day.
assistant