Hello, Larry Smith here.
user
Hello Larry, how may I help you?
assistant
I want to travel from IAD to ATL, will you please help me in booking my ticket?
user
Ok, can you provide your dates?
assistant
My preferable dates are from 01/18 to 01/20.
user
Sorry Larry Smith, we cannot found any flights on your dates. Thank you for contacting us.
assistant
Oh! It's ok, thank you for your help. You are welcome.
user