You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Kenneth Johnson, I want to book a flight to New York city to visit Bryant Park. Can you help me to book a flight ticket?

ASSISTANT: Sure, let me know your locations for finding a flight for you.

USER: I will fly from PA-PHL to NY-EWR.

ASSISTANT: Ok, please provide your dates of travel.

USER: I will travel on 11/18 and return on 11/20.

ASSISTANT: According to your information, there is no flight for you on your route.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome.