You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me for booking a flight ticket to LAS from DFW?

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

USER: My trip dates are on Feb 21 and 23.

ASSISTANT: Do you have any connection limit?

USER: I need a stopover.

ASSISTANT: Any other requirements to be met?

USER: My depart time is afternoon.

ASSISTANT: May I know your good name?

USER: Janet Collins here.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.