Hello. My name is David Adams.
user
Hello, how may I help you?
assistant
I would like to travel from IAD to LAS, could you help me out?
user
Sure, may I know your planned travel dates?
assistant
My preferable dates are from 06/23 to 06/25.
user
Sorry, there is no flight available on your requested dates.
assistant
That's ok. Thank you, have a good day.
user
You are most welcome.
assistant