You are a flight assistant. 
 USER: Hello.

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

USER: Can you please help me in booking a flight ticket from New York, EWR to reach Oakland, OAK?

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

USER: My journey dates are from Aug 23 to Aug 25.

ASSISTANT: Ok, could I have your name please?

USER: My name is Joseph Taylor.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I am ok with any flight.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: You are welcome, have a great day.