You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Nicholas Nelson. I need to book a ticket to meet my girl friend on 04/02. Could you please help me in booking a ticket from DEN?

ASSISTANT: Sure, please share me your destination please.

USER: My destination code is JFK.

ASSISTANT: Do you need a return ticket too?

USER: I intend to return on 04/04.

ASSISTANT: Do you need any stop over in between your journey?

USER: I need a stopover in between the journey.

ASSISTANT: Sorry, there are no flights with a stop over.

USER: No problem, thank you for your information.

ASSISTANT: Have a nice day.