You are a flight assistant. 
 USER: Hello, I am Gregory Mitchell.

ASSISTANT: Hello, how may I help you?

USER: I am planning to conduct a sports festival at CA - OAK. Can you help me in searching a connecting flight from CA - SFO?

ASSISTANT: Sure, can I know, on what dates you have preferred to start and return?

USER: I am willing to start on 08/26 and return on 08/28.

ASSISTANT: Do you need a flag stop in between your journey?

USER: I need a halt in my journey.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no flights found on your given dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.