You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I would like to attend Classical music event in Carnegie Hall at New York, can you help me with booking ticket from DEN to LGA?

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

USER: Sure, my journey dates are from Oct 28 to 30.

ASSISTANT: Do you have any other requirements?

USER: I need a economy class with 1 connection.

ASSISTANT: Can I know your name please?

USER: Sure, I am Ronald Jones.

ASSISTANT: Ok, please wait.

USER: Sure.

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

USER: It's ok, thank you.

ASSISTANT: Most welcome.