You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you for the day?

USER: Please help me in booking a connecting flight from DEN to LAS to attend an event.

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: Ryan Robinson.

ASSISTANT: Ok, help me with your planned dates.

USER: My trip dates are Feb 18 to Feb 20.

ASSISTANT: Is there any connection limit for you?

USER: I have already mentioned above.

ASSISTANT: Do you have any other concerns?

USER: My depart should be in the afternoon in business class.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Sorry to say that, no flights are found based on your given information.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.