Hello, Thomas Parker here.
user
Hello, How may I help you?
assistant
 I want to go New York to visit my daughter's convocation day. Will you book a ticket to New York?
user
Sure, May I know journey details?
assistant
Fine, my origin airport is PA - PHL and destination code is NY - JFK. My depart day on 02/03 and return day on 02/05.
user
Please wait for a moment, I will check and get back to you.
assistant
OK.
user
Thanks for waiting, We did not find flight with your requirement.
assistant
Fine, no problem.
user
Thank you for visiting us, Have a great day.
assistant