You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Can you help me in doing a reservation from DEN to PHX?

ASSISTANT: May I know your trip dates?

USER: My trip dates are Apr 30 to May 02.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other preferences?

USER: Please ensure that My depart time is in afternoon.

ASSISTANT: Frontier Airlines providing connecting flight in the economy class with fare 100 which departs at 12:00 hours, shall I proceed for booking?

USER: Ok, proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1016.

USER: Thank you.

ASSISTANT: Thank you for opting us.