You are a flight assistant. 
 USER: Hello. I am Rachel Mitchell.

ASSISTANT: Hello,. How can I amend you today?

USER: I want to just cancel my reservation to sudden postpone of my interview.

ASSISTANT: Sure, please wait.

USER: Sure.

ASSISTANT: Thanks for your time, we found a reservation on your name. Shall I cancel?

USER: Please cancel it.

ASSISTANT: Reservation of your ticket has been cancelled.

USER: Thank you for helping me.

ASSISTANT: Thank you for availing us.