You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Myself Nancy Lee. I am looking for a flight from OAK to PHL, can you help me in booking the flight ticket?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My planned travel dates are 06/17 and 06/19.

ASSISTANT: Ok, please wait for a while.

USER: Ok, ensure that I need a direct flight.

ASSISTANT: Sorry, there is no flight in your route with your travel dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.