Hello.
user
Hello, how may I help you?
assistant
I am Robert Lee, want to travel from SFO to BOS. Can you please help me?
user
Sure, may I know your travelling dates?
assistant
My travel dates are from 06/04 to 06/06.
user
Please wait for a while.
assistant
Sure.
user
Sorry, we regret to inform you that there is no flight available as per your request.
assistant
That's fine, thank you.
user
Most welcome.
assistant