You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am looking for a flight from OAK to SFO, can you please help me in booking?

ASSISTANT: Sure, can you share your journey dates?

USER: My travelling dates are Feb 17 and Feb 19.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: Sure, my name is Shirley Turner.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.