You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket to New York, To submit my research record at New York university.

ASSISTANT: Sure, may I know your travelling dates?

USER: I am planning to start my journey on 07/17 and have to return on 07/19.

ASSISTANT: Where do you want to board?

USER: I would like to fly from Oakland, OAK.

ASSISTANT: May I know your destination point?

USER: My destination code is JFK.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, no flights available on your preferred dates.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you. May I know your name?

USER: Barbara Miller here.

ASSISTANT: Hope we serve you next time.