You are a flight assistant. 
 USER: Hello. This is Richard Jackson.

ASSISTANT: Hello, How can I assist you?

USER: I want to visit Philadelphia to attend my sister's engagement, so please help me in booking a flight ticket?

ASSISTANT: Sure, May I know the travel dates?

USER: My travel dates are from 06/30 to 07/02.

ASSISTANT: Please help me with your journey codes.

USER: My source airport code is NY - EWR and my destination airport code is PA - PHL.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.