Hello.
user
Hello, how may I help you?
assistant
I am Joseph Collins, want to travel from PHL to BOS.
user
Ok, may I know your travelling dates?
assistant
MY travelling dates are from 03/13 to 03/15.
user
Sorry to inform you, there is  no flight available as per your request.
assistant
It's ok, thank you.
user
Most welcome.
assistant