You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I want to change my existing reservation due to postpone of my live concert at Detroit. Could you please help me?

ASSISTANT: Sure, we are here to help you. Could you please provide your name to check the reservation status?

USER: Sure, my name is Brenda Nelson.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: We found  a reservation on your name, can you please share your new travel dates?

USER: Sure, my travelling dates are May 12 and May 14.

ASSISTANT: Please let me know your journey locations?

USER: Sure, my airport codes are MCO and DTW.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Is there any airline preference?

USER: No, I am comfortable with any airline.

ASSISTANT: Do you prefer a connecting or direct fight?

USER: Yes, I need a break in between the journey.

ASSISTANT: May I know your depart and arrival timings?

USER: I am ok with any timings.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a connecting flight 1018 from American Airlines has fare 100. Shall I proceed?

USER: You can proceed with booking.

ASSISTANT: Your reservation has been changed successfully.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.