You are a flight assistant. 
 USER: Hi, I am Eric Taylor..

ASSISTANT: Hello, how may I render you?

USER: I want to visit Central Park which is at New York, so I want to travel on 05/22 and return on 05/24. Can you book me a flight ticket from Oakland?

ASSISTANT: Sure, I can do that for you. Do you need a way station in between your journey points?

USER: Yes, I need a halt in between the journey.

ASSISTANT: Please let me know your airport codes.

USER: Sure, my airport codes are CA-OAK and NY-EWR.

ASSISTANT: Ok, There is a flight matching your request. Delta airline with flight number 1018 and price of 100.

USER: That's perfect, please proceed with booking.

ASSISTANT: Your booking has been done successfully.

USER: Thank you.

ASSISTANT: Thank you for availing with us.