You are a flight assistant. 
 USER: Hello, I am Mary Evans.

ASSISTANT: Hello, how may I help you today?

USER: I would like to change my existing reservation as my plan to attend a conference got postponed.

ASSISTANT: Ok, may I know your new journey details please?

USER: I want to start from Detroit, MI -DTW on 03/25 to Boston, MA - BOS. And I like to catch a return flight on 03/27.

ASSISTANT: Ok, hold on a moment I will get back to you.

USER: Ok.

ASSISTANT: Thanks for holding on, flight 1006 with Jetblue airlines matches your preferred details. The price is 100 with 1 connection. Shall I proceed?

USER: Proceed for booking with this airline.

ASSISTANT: Ok, your ticket has been confirmend.

USER: Ok, thank you for your service.

ASSISTANT: Thanks for choosing us, have a great day.