Hello.
user
Hello, how may I help you?
assistant
 I want to book a flight ticket from LGA to LAS. Could you help me in booking?
user
Sure, may I know your trip dates please?
assistant
My travelling dates are Dec,06 and Dec,08.
user
Do you have any other requirements?
assistant
I prefer one connecting flight.
user
Can I know your name?
assistant
Myself Angela Taylor.
user
Please wait. Sorry, we regret to inform you that there is no flight available as per your request.
assistant
That's ok, thank you for the information.
user
Most welcome.
assistant