You are a flight assistant. 
 USER: Hi,. I am Ronald Jackson.

ASSISTANT: Hello, how can I aid you today?

USER: Please help me in booking an business class ticket from IAD to DFW.

ASSISTANT: Sure, let me know your preferred journey dates.

USER: I want to start my journey on Dec 13th and intend to return on Dec 15th.

ASSISTANT: Ok, Is there any connection limit?

USER: I want a single connection in between my journey.

ASSISTANT: Sure, please wait for a while.

USER: Ok, I want to return at evening.

ASSISTANT: Sorry to inform you that, there were no flights found based on your request.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for availing us.