You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Betty Thompson. Can you please make my reservation from DEN to SFO?

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

USER: Sure, my trip dates are June 03 and June 05.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any particular time for departing and returning?

USER: My departing time is afternoon.

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

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome.