You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, may I know your name for change in your reservation?

USER: Sure, my name is Anna Hall.

ASSISTANT: May I know you new airport codes?

USER: My new preferable airport codes are EWR and OAK.

ASSISTANT: Please mention your new travelling dates?

USER: My new travel dates are from Sept 04 to Sept 06.

ASSISTANT: Do you need any connection limit in this reservation?

USER: I need a connecting flight in my journey.

ASSISTANT: Do you have any other specification?

USER: Yes, I would like to return in the afternoon time.

ASSISTANT: Please wait a moment, let me check best flight for your travel.

USER: Sure, I will wait for your response.

ASSISTANT: There is a flight with one connection and the price is 100 in United Airlines, can I proceed with the reservation?

USER: Yes, please proceed with that flight ticket booking.

ASSISTANT: Your ticket has been reserved with the flight number 1016.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching our service.