You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: Could you please book a flight ticket from ORD to SFO?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: Thank you, my travelling dates are Feb 29 and Mar 02.

ASSISTANT: Ok, please let me know the timings of your journey.

USER: I am comfortable to travel at any time.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Can I have your good name please to proceed further?

USER: Yes, my name is Shirley Wilson.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us, have a good day.