Hi.
user
Hello, how may I help you?
assistant
Can you please help me to book flight ticket from LAS to PHL?
user
Sure, may I know your trip dates please?
assistant
My trip dates are July 5 and July 7.
user
Do you have any other requirements?
assistant
I prefer a connecting flight which depart in the evening.
user
Can I know your name please?
assistant
Sure, I am Richard Johnson.
user
Sorry, we regret to inform you that there is no flight available as per your request.
assistant
It's ok, thank you for searching.
user
Most welcome.
assistant