Hello. I am Frank Perez.
user
Hello, how can I aid you?
assistant
I planned to visit Chicago to visit Lincoln Park, can you help me to book flight ticket from PA-PHL?
user
Sure. May I know your other airport code?
assistant
My destination airport code is IL-ORD.
user
Let me know your travelling dates.
assistant
I will travel on 12/29 and return on 12/31.
user
Please wait for a while. Thanks for waiting, there is no flights found on your given requirements.
assistant
Thank you for the service.
user
Thank you.
assistant