You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I help you?

USER: My name is Mary Adams, I want to change my reservation as plan to visit New York for vacation is postponed. Can you change my reservation?

ASSISTANT: Sure, I am perky to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation on your name.

USER: Thank you for the information.

ASSISTANT: Thank you for opting us.