You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me to book a flight ticket from OAK to PHX?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travelling dates are Feb 21 to Feb 23.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I would like to travel in a connecting flight.

ASSISTANT: May I know your good name please?

USER: Shirley Collins.

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

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.