You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Betty William. I want to book a flight ticket from SFO to JFK. Could you help me in booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from Aug 18-20.

ASSISTANT: Can I have your preferences?

USER: I need a connecting flight.

ASSISTANT: Sorry to say, no flight is available for you.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.