You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in changing my existing reservation, as my exam got postponed.

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

USER: Myself, Robert Lopez.

ASSISTANT: Just a moment, let me check your reservation status in our records.

USER: Ok.

ASSISTANT: I found your reservation. May I know your new airport codes?

USER: My airport codes are DTW to MSP.

ASSISTANT: When are you planning your trip?

USER: My new trip dates are Feb 07-09.

ASSISTANT: Is there any specifications regarding your journey?

USER: No more specifications.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: There is a flight with Frontier Airlines and the ticket fare is 100. Would you like me to make the booking now?

USER: Ok, please proceed.

ASSISTANT: Your ticket is reserved in economy class with the flight-1013.

USER: Thank you for changing.

ASSISTANT: Thank you very much for approaching our agency.