You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am Barbara Jones, can you please help me in booking my flight ticket to LAX from OAK?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, my departure and arrival dates are June 5 and June 7.

ASSISTANT: Sorry, there is no flight with your request.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: You are welcome, have a great day.