You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I would like to visit Denver for site seeing, please help me in booking a ticket from PHL to DEN.

ASSISTANT: May I know your journey dates?

USER: My planned journey dates are on Apr 10 and Apr 12.

ASSISTANT: May I know your connection limit?

USER: I need a flight with single connection.

ASSISTANT: Is there any other requirements?

USER: No, thank you for asking.

ASSISTANT: May I know your good name?

USER: My name is Shirley Hall.

ASSISTANT: United Airlines providing connecting flight in the economy class with fare 200, shall I proceed for booking?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has been reserved with flight number 1013.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.