You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my reservation, can you please help me out?

ASSISTANT: Sure, may I know your name please?

USER: Katherine Smith here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a reservation with your given name, please share your new journey dates.

USER: Sure, my travel dates are from Mar 20 to Mar 22.

ASSISTANT: May I know your source and destination airport codes?

USER: My source and destination airport codes are DTW and ATL.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Do you want business class or economy class?

USER: I am ok with any class.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: We found a Frontier airline, flight number: 1002, price: 100 with one connection. Shall I proceed to booking?

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been confirmed in economy class.

USER: Thank you for changing my reservation.

ASSISTANT: Thank you for choosing us.