You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel from ORD to DEN. Can you please help me in ticket booking?

ASSISTANT: Sure, may I know your trip dates please?

USER: My travel dates are from Jan 02 to Jan 04.

ASSISTANT: Do you have any other requirements?

USER: Make sure, my departing time should be in the evening with 1 connection.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Can I know your name please?

USER: Myself Brian Robinson.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: That's ok, thank you.

ASSISTANT: Most welcome.