You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I want to change my existing reservation. Can you please aid me to change it?

ASSISTANT: Sure, I am here to help you. May I know your good name please?

USER: David Scott is my name.

ASSISTANT: Please wait for a mean while.

USER: Sure.

ASSISTANT: There is a reservation found on your name, can you please share me with your dates of journey?

USER: My planned dates are on May 10 and 12.

ASSISTANT: Ok, may I know your airport codes of journey please?

USER: Airport codes are CLT - MSP.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I found a connecting flight of fare 100 with the Frontier airline, are you ok with this booking?

USER: Ok, please proceed.

ASSISTANT: Ok, I have reserved your ticket with the flight number 1011.

USER: Thank you.

ASSISTANT: You are welcome, have a safe flight.