You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you toady?

USER: I am Matthew Clark. I am planning to visit Philadelphia to meet my father, can you please help me in booking a flight ticket from ORD to PHL?

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: Can you provide your travel dates?

USER: My travelling dates are Nov 16 and Nov 18.

ASSISTANT: Do you need a stopover?

USER: I need a direct flight.

ASSISTANT: Sorry, there is no flight on your required routs.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.