Hello.
user
Hello, how may I assist you today?
assistant
Please help me to book a flight ticket from IAD to LAS.
user
May I know your travelling dates?
assistant
My travel dates are from Aug, 19 to Aug, 21.
user
On which name shall I reserve flight ticket?
assistant
Richard Evans.
user
Sorry, there are no flight tickets available on your journey dates.
assistant
Thank you for your information.
user
Thank you for reaching our service.
assistant