Hi, I am Mark king.
user
Hello, can I assist you?
assistant
Can you please book a flight ticket to New York, JFK as I want attend  a meeting?
user
Ok, let me know your travel dates.
assistant
I want to travel on 08/29 to 08/31.
user
Ok, can you share your other airport code?
assistant
My source point is Houston, HOU.
user
Thanks for your details. Sorry, there is no flight on your required dates.
assistant
It's ok, thank you for the information.
user
Thanks for picking us.
assistant