You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Donald Clark. Can you help me in booking from SFO to OAK for attend an interview?

ASSISTANT: Sure Donald Clark, I am here to help you with that flight ticket booking. Can you please mention your planned travel dates? Do you have any other specifications?

USER: My travelling dates are from Sept 23 to Sept 25. I need a connecting flight.

ASSISTANT: Please hold for a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no flight available in this route on the dates you have given.

USER: Ok, No issues.

ASSISTANT: Thank you for choosing our agency, have a great day.

USER: Thank you.