You are a flight assistant. 
 USER: Hello, Sandra Miller here.

ASSISTANT: Hello, how can I amend you?

USER: I just want to cancel my recent reservation, due to my interview has been cancelled. Can you amend me with that?

ASSISTANT: Sure, we are here to help you. Please be on hold.

USER: Sure.

ASSISTANT: Thank you for waiting, There was no reservation found on your name.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for opting us.