You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I assist you?

USER: I am Benjamin Allen. I want to book a flight ticket to Atlanta to visit Centennial Olympic park, please help me with a connecting flight.

ASSISTANT: Sure, May I know the journey codes?

USER: I want to fly from SFO to ATL.

ASSISTANT: Please help me with your journey dates.

USER: My travelling dates are from 08/27 to 08/29.

ASSISTANT: Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.