You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Deborah Thompson. I need to change my existing reservation due to postpone of my event. Could you please help me?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: We found your reservation, can you share your travelling dates?

USER: I want to fly on 11/07 and return on 11/09.

ASSISTANT: May I know your new journey codes?

USER: Sure, MI-DTW and MA-BOS are my airport codes.

ASSISTANT: There is a delta airline, flight number as 1001 with the fare of 100.

USER: You can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.