You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Due to summer vacation I would like go for a round trip. Can you book a flight ticket for me?

ASSISTANT: Sure, may I know your journey details?

USER: My travelling details are starting at San Francisco, CA - SFO on 04/15 and return on 04/17. Make sure that price limit must be 500 with one connection.

ASSISTANT: Can you please provide your name for booking?

USER: Steven Hill is my name.

ASSISTANT: Thanks for providing information Steven Hill. Wait for a while, I will check and let you know.

USER: Sure.

ASSISTANT: Thanks for waiting, we are gleeful to inform you that 1012 UA airline matches to your criterion. The price is 100 with one connection. May I proceed for booking?

USER: Yes, you can.

ASSISTANT: Ok, the booking has been reserved.

USER: Thanks for booking.

ASSISTANT: Thanks for availing us, Have a great day.