You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Please book a flight ticket from DEN to LAX?

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: My journey dates are Mar 22 and Mar 24.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I prefer a economy class.

ASSISTANT: Ok, please share your name.

USER: I am Scott Green.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: It's ok, thank you.

ASSISTANT: Thank you for approaching us.