You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a flight ticket form OAK to PHX. Could you help me in booking?

ASSISTANT: Ok, may I know your journey locations for this journey?

USER: My travelling dates are from Sep 16-18.

ASSISTANT: Do you need a direct flight?

USER: No, I prefer for connecting flight.

ASSISTANT: May I know your specifications please?

USER: I have mentioned all my specifications.

ASSISTANT: Meanwhile, can you please tell me your name?

USER: Nicholas Garcia here.

ASSISTANT: I am very sorry to say, there are no flights available for your journey.

USER: That's ok, no problem.

ASSISTANT: Thank you for choosing our agency.

USER: Thank you.

ASSISTANT: Have a nice day.