Hi.
user
Hello.
assistant
I am Patrick Williams.
user
How can I aid you?
assistant
I want to visit Philadelphia Zoo with my kids for their vacation at PA-PHL. Can you book a ticket from Seattle, WA-SEA?
user
Sure, I am here to help you out. Do you have any connection limit?
assistant
I need  a direct flight.
user
May I know your travelling dates?
assistant
My journey dates are 12/12 and 12/14.
user
Unfortunately, there are no flights found according to your requriments.
assistant
OK, thank you for your service.
user
Thank you for contating us.
assistant