You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. In which way I can assist you today?

USER: I am Dennis Hill, can you help me for changing my existing reservation, because while booking I gave wrong airport codes in my previous reservation?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: I have found your reservation. Can you please mention your new airport code names?

USER: My airport codes CLT to EWR.

ASSISTANT: May I know your journey dates for booking flight ticket?

USER: My travelling dates 03/27 and 03/29.

ASSISTANT: Ok, just give me a moment, I will check is there any flights available or not, as per your requested dates.

USER: Ok, but make sure with connection 1.

ASSISTANT: Sure. There is a flight available as per your requested details, airline is Frontier and flight number is 1021. Shall I proceed?

USER: Proceed to booking that flight.

ASSISTANT: Your flight ticket is booked successfully.

USER: Thank you for your services.

ASSISTANT: Thank you for reaching us, happy journey.