You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: I am Deborah Rodriguez.

ASSISTANT: Welcome to flight booking agency Deborah Rodriguez.

USER: I need a direct flight from Oakland to New York. Can you please help me to book a flight ticket?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable departure and return dates of travelling?

USER: Thank you. I am willing to travel on the dates of Dec 08 and Dec 10.

ASSISTANT: Ok, may I know your regional airport codes for booking?

USER: The airport codes are OAK and LGA.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Ok, take your time and make sure that the price limit is 500 or less.

ASSISTANT: We regret to inform you that, there are no direct flights available for your journey with your requested dates of travelling.

USER: It's ok, not a problem with that. Anyways thank you for checking the flight availability.

ASSISTANT: Thank you for reaching us, have a great day.

USER: You are most welcome.