You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to visit Oakland, will you help me in booking the flight ticket from PHL to OAK?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: My preferable journey dates are Aug 16 And 18.

ASSISTANT: Would you like to fly with connecting flight or direct flight?

USER: I need a direct flight.

ASSISTANT: Is there any other criteria?

USER: No, thank you for asking.

ASSISTANT: If you can help me with your name, I can check with the availability of flights.

USER: Sure, myself Jacob Lopez.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.