You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need to travel OAK and DFW, can you please reserve flight ticket ?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are June,30 and June,02.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight for my travel.

ASSISTANT: Can you provide exact travelling dates please?

USER: My travelling dates are June,30 and July,02.

ASSISTANT: May I know your name?

USER: Myself Ronald Allen.

ASSISTANT: Sorry, no flights available on your route.

USER: That's ok, I will choose any other source to reach my destination.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.