Hello.
user
Hello. How can I  help you?
assistant
Can you please search a direct flight for me?
user
Ok, may I know your travelling dates?
assistant
My travelling dates are 10/21 and 10/23.
user
May I know your travelling airport codes?
assistant
My travelling airport codes are DTW to PHL.
user
May I know your name please?
assistant
Ok, myself Charles Martin.
user
I am sorry no flights found on your dates.
assistant
Ok, fine thank you for checking.
user